./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i --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_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/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_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/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_06643477-0719-4024-ba1a-abb8b49fe932/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 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:46,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:46,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:46,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:46,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:46,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:46,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:46,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:46,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:46,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:46,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:46,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:46,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:46,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:47,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:47,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:47,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:47,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:47,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:47,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:47,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:47,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:47,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:47,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:47,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:47,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:47,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:47,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:47,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:47,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:47,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:47,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:47,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:47,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:47,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:47,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:47,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:47,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:47,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:47,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:47,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:47,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:25:47,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:47,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:47,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:47,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:47,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:47,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:47,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:47,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:47,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:47,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:47,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:47,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:47,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:47,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:47,104 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:47,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:47,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:47,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:47,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:47,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:47,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:47,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:47,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:47,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:47,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:47,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:47,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:47,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:47,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:47,109 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:47,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:47,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:47,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:47,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:47,110 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_06643477-0719-4024-ba1a-abb8b49fe932/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d [2021-11-07 01:25:47,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:47,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:47,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:47,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:47,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:47,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-07 01:25:47,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/1167b1555/78da6083cbc74e79b88143b742dfad19/FLAG65a1b7808 [2021-11-07 01:25:48,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:48,089 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-07 01:25:48,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/1167b1555/78da6083cbc74e79b88143b742dfad19/FLAG65a1b7808 [2021-11-07 01:25:48,304 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/1167b1555/78da6083cbc74e79b88143b742dfad19 [2021-11-07 01:25:48,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:48,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:48,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:48,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:48,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:48,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:48" (1/1) ... [2021-11-07 01:25:48,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ff7ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:48, skipping insertion in model container [2021-11-07 01:25:48,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:48" (1/1) ... [2021-11-07 01:25:48,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:48,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:48,791 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-07 01:25:48,880 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-07 01:25:48,881 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-07 01:25:48,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:48,906 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 01:25:48,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24e994b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:48, skipping insertion in model container [2021-11-07 01:25:48,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:48,907 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:48,909 INFO L168 Benchmark]: Toolchain (without parser) took 599.78 ms. Allocated memory is still 121.6 MB. Free memory was 90.3 MB in the beginning and 84.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:48,910 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory is still 76.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:48,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 595.09 ms. Allocated memory is still 121.6 MB. Free memory was 90.1 MB in the beginning and 84.8 MB in the end (delta: 5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:48,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory is still 76.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 595.09 ms. Allocated memory is still 121.6 MB. Free memory was 90.1 MB in the beginning and 84.8 MB in the end (delta: 5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/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_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/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_06643477-0719-4024-ba1a-abb8b49fe932/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 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:51,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:51,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:51,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:51,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:51,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:51,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:51,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:51,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:51,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:51,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:51,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:51,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:51,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:51,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:51,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:51,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:51,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:51,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:51,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:51,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:51,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:51,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:51,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:51,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:51,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:51,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:51,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:51,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:51,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:51,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:51,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:51,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:51,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:51,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:51,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:51,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:51,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:51,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:51,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:51,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:51,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:25:51,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:51,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:51,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:51,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:51,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:51,271 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:51,271 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:51,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:51,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:51,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:51,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:51,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:51,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:51,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:51,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:51,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:51,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:51,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:51,275 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:51,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:51,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:51,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:51,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:51,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:51,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:51,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:51,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:51,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:51,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:51,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:51,277 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:51,277 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:51,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:51,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:51,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:51,278 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_06643477-0719-4024-ba1a-abb8b49fe932/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f8d40fc3d39b827c494ff373d43bd116589a8fd89c6e972621bd6e0216b2f6d [2021-11-07 01:25:51,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:51,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:51,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:51,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:51,672 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:51,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-07 01:25:51,748 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/64416513e/fd41805181084a78a04ab78d0213cf0a/FLAG008048e79 [2021-11-07 01:25:52,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:52,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i [2021-11-07 01:25:52,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/64416513e/fd41805181084a78a04ab78d0213cf0a/FLAG008048e79 [2021-11-07 01:25:52,666 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/data/64416513e/fd41805181084a78a04ab78d0213cf0a [2021-11-07 01:25:52,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:52,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:52,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:52,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:52,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:52,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:52" (1/1) ... [2021-11-07 01:25:52,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b3dec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:52, skipping insertion in model container [2021-11-07 01:25:52,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:52" (1/1) ... [2021-11-07 01:25:52,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:52,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:53,206 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-07 01:25:53,364 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-07 01:25:53,365 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-07 01:25:53,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:53,392 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:53,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:53,426 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-07 01:25:53,517 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-07 01:25:53,518 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-07 01:25:53,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:53,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:53,597 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[33021,33034] [2021-11-07 01:25:53,639 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44124,44137] [2021-11-07 01:25:53,640 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_06643477-0719-4024-ba1a-abb8b49fe932/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-2.i[44245,44258] [2021-11-07 01:25:53,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:53,716 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:53,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53 WrapperNode [2021-11-07 01:25:53,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:53,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:53,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:53,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:53,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:53,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:53,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:53,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:53,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:54,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:54,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:54,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:54,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:54,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:54,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:25:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:25:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:25:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:25:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:54,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:26:00,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:26:00,907 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-07 01:26:00,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:00 BoogieIcfgContainer [2021-11-07 01:26:00,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:26:00,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:26:00,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:26:00,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:26:00,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:52" (1/3) ... [2021-11-07 01:26:00,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df742a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:00, skipping insertion in model container [2021-11-07 01:26:00,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (2/3) ... [2021-11-07 01:26:00,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df742a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:00, skipping insertion in model container [2021-11-07 01:26:00,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:00" (3/3) ... [2021-11-07 01:26:00,917 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test7-2.i [2021-11-07 01:26:00,922 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:26:00,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:26:00,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:26:00,996 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 01:26:00,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:26:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 01:26:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:26:01,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:01,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:01,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-07 01:26:01,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:01,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727811960] [2021-11-07 01:26:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:01,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:01,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:26:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:26:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:01,349 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 01:26:01,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:01,373 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 01:26:01,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:01,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727811960] [2021-11-07 01:26:01,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727811960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:01,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:26:01,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973476886] [2021-11-07 01:26:01,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:26:01,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:26:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:26:01,397 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 01:26:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:01,459 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-07 01:26:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:26:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-07 01:26:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:01,476 INFO L225 Difference]: With dead ends: 419 [2021-11-07 01:26:01,476 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 01:26:01,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 01:26:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 01:26:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 01:26:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 01:26:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-07 01:26:01,554 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-07 01:26:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:01,555 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-07 01:26:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 01:26:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-07 01:26:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:26:01,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:01,558 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:01,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:26:01,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-07 01:26:01,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:01,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769912682] [2021-11-07 01:26:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:01,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:01,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:01,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:26:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:02,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:02,252 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 01:26:02,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:02,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769912682] [2021-11-07 01:26:02,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769912682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:02,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:02,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:26:02,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636333890] [2021-11-07 01:26:02,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:02,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:02,262 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 01:26:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:06,061 INFO L93 Difference]: Finished difference Result 460 states and 606 transitions. [2021-11-07 01:26:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-07 01:26:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:06,066 INFO L225 Difference]: With dead ends: 460 [2021-11-07 01:26:06,066 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 01:26:06,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 01:26:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 01:26:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2021-11-07 01:26:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.3273381294964028) internal successors, (369), 279 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 01:26:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 369 transitions. [2021-11-07 01:26:06,088 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 369 transitions. Word has length 10 [2021-11-07 01:26:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 369 transitions. [2021-11-07 01:26:06,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 01:26:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 369 transitions. [2021-11-07 01:26:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:26:06,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:06,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:06,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:26:06,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:06,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 627335073, now seen corresponding path program 1 times [2021-11-07 01:26:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:06,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954745658] [2021-11-07 01:26:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:06,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:06,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:06,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:26:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:06,651 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 01:26:06,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:06,792 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 01:26:06,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:06,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954745658] [2021-11-07 01:26:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954745658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:06,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:26:06,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642753272] [2021-11-07 01:26:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:26:06,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:26:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:26:06,795 INFO L87 Difference]: Start difference. First operand 280 states and 369 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:06,939 INFO L93 Difference]: Finished difference Result 450 states and 593 transitions. [2021-11-07 01:26:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:26:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:06,942 INFO L225 Difference]: With dead ends: 450 [2021-11-07 01:26:06,942 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 01:26:06,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 01:26:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2021-11-07 01:26:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.2640845070422535) internal successors, (359), 285 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 01:26:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 359 transitions. [2021-11-07 01:26:06,962 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 359 transitions. Word has length 44 [2021-11-07 01:26:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:06,963 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 359 transitions. [2021-11-07 01:26:06,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 359 transitions. [2021-11-07 01:26:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:26:06,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:06,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:06,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:07,182 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash -317553387, now seen corresponding path program 1 times [2021-11-07 01:26:07,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:07,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008511963] [2021-11-07 01:26:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:07,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:07,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:07,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:07,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:26:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:07,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:26:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:07,651 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 01:26:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:08,261 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 01:26:08,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:08,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008511963] [2021-11-07 01:26:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008511963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:08,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:08,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 9 [2021-11-07 01:26:08,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903919653] [2021-11-07 01:26:08,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:26:08,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:26:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:08,264 INFO L87 Difference]: Start difference. First operand 286 states and 359 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 01:26:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:08,429 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2021-11-07 01:26:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 44 [2021-11-07 01:26:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:08,435 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:26:08,435 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 01:26:08,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 01:26:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 274. [2021-11-07 01:26:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 272 states have (on average 1.2463235294117647) internal successors, (339), 273 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 01:26:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 339 transitions. [2021-11-07 01:26:08,448 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 339 transitions. Word has length 44 [2021-11-07 01:26:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:08,449 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 339 transitions. [2021-11-07 01:26:08,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 01:26:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 339 transitions. [2021-11-07 01:26:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:26:08,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:08,452 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:08,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:08,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:08,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash -575718825, now seen corresponding path program 1 times [2021-11-07 01:26:08,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:08,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224741382] [2021-11-07 01:26:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:08,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:08,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:08,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:26:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:09,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:09,128 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:26:09,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:26:09,230 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:26:09,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:26:09,352 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 01:26:09,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:09,539 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 01:26:09,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:09,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224741382] [2021-11-07 01:26:09,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224741382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:09,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:09,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:09,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201476044] [2021-11-07 01:26:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:09,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:09,542 INFO L87 Difference]: Start difference. First operand 274 states and 339 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:18,330 INFO L93 Difference]: Finished difference Result 557 states and 668 transitions. [2021-11-07 01:26:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:26:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:26:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:18,335 INFO L225 Difference]: With dead ends: 557 [2021-11-07 01:26:18,335 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:26:18,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:26:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:26:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 273. [2021-11-07 01:26:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.2435424354243543) internal successors, (337), 272 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 01:26:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 337 transitions. [2021-11-07 01:26:18,352 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 337 transitions. Word has length 44 [2021-11-07 01:26:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:18,352 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 337 transitions. [2021-11-07 01:26:18,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 337 transitions. [2021-11-07 01:26:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:26:18,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:18,362 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:18,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:18,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash 858593360, now seen corresponding path program 1 times [2021-11-07 01:26:18,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:18,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624313021] [2021-11-07 01:26:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:18,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:18,578 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:18,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:26:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:19,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:19,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:19,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:19,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624313021] [2021-11-07 01:26:19,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624313021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:19,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:19,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:26:19,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840780994] [2021-11-07 01:26:19,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:26:19,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:26:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:26:19,441 INFO L87 Difference]: Start difference. First operand 273 states and 337 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:26:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:19,573 INFO L93 Difference]: Finished difference Result 545 states and 679 transitions. [2021-11-07 01:26:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:26:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:19,576 INFO L225 Difference]: With dead ends: 545 [2021-11-07 01:26:19,576 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 01:26:19,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 01:26:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-11-07 01:26:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.1805054151624548) internal successors, (327), 278 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 01:26:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2021-11-07 01:26:19,588 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 69 [2021-11-07 01:26:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2021-11-07 01:26:19,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:26:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2021-11-07 01:26:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:26:19,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:19,591 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:19,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:19,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:19,810 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-07 01:26:19,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:19,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833953961] [2021-11-07 01:26:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:19,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:19,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:19,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:26:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:20,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:20,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833953961] [2021-11-07 01:26:20,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833953961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:20,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:20,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:20,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949500519] [2021-11-07 01:26:20,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:20,657 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 01:26:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:20,736 INFO L93 Difference]: Finished difference Result 516 states and 611 transitions. [2021-11-07 01:26:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:26:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:20,740 INFO L225 Difference]: With dead ends: 516 [2021-11-07 01:26:20,740 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 01:26:20,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:26:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 01:26:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-07 01:26:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 280 states have (on average 1.1785714285714286) internal successors, (330), 281 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 01:26:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2021-11-07 01:26:20,760 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 69 [2021-11-07 01:26:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:20,761 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2021-11-07 01:26:20,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 01:26:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2021-11-07 01:26:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:26:20,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:20,764 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:20,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:20,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:20,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash 982130832, now seen corresponding path program 1 times [2021-11-07 01:26:20,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:20,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155079486] [2021-11-07 01:26:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:20,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:20,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:20,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:20,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:26:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:21,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155079486] [2021-11-07 01:26:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155079486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914803783] [2021-11-07 01:26:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:21,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:21,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:21,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:26:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:22,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:22,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914803783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:23,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173123755] [2021-11-07 01:26:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:23,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:23,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:26:23,045 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:26:23,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:26:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:23,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:23,780 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:26:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:26:23,890 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:26:23,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:26:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:23,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173123755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:24,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:26:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 01:26:24,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737197581] [2021-11-07 01:26:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:26:24,165 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:34,120 INFO L93 Difference]: Finished difference Result 423 states and 493 transitions. [2021-11-07 01:26:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:26:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:26:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:34,124 INFO L225 Difference]: With dead ends: 423 [2021-11-07 01:26:34,124 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 01:26:34,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:26:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 01:26:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-11-07 01:26:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.177304964539007) internal successors, (332), 283 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 01:26:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-11-07 01:26:34,146 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 72 [2021-11-07 01:26:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:34,146 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-11-07 01:26:34,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-11-07 01:26:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:26:34,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:34,149 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:34,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 01:26:34,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 01:26:34,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:34,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:34,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -786181332, now seen corresponding path program 1 times [2021-11-07 01:26:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:34,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103273313] [2021-11-07 01:26:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:34,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:34,767 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:34,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:26:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:35,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:36,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:36,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103273313] [2021-11-07 01:26:36,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103273313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:36,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012104204] [2021-11-07 01:26:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:36,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:36,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:36,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:36,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:26:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:26:37,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:26:37,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012104204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:37,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:37,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:37,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258549445] [2021-11-07 01:26:37,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:37,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:37,703 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:26:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:42,392 INFO L93 Difference]: Finished difference Result 605 states and 712 transitions. [2021-11-07 01:26:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2021-11-07 01:26:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:42,396 INFO L225 Difference]: With dead ends: 605 [2021-11-07 01:26:42,396 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 01:26:42,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:26:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 01:26:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2021-11-07 01:26:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 357 states have (on average 1.1820728291316527) internal successors, (422), 358 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 01:26:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 422 transitions. [2021-11-07 01:26:42,415 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 422 transitions. Word has length 106 [2021-11-07 01:26:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:42,415 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 422 transitions. [2021-11-07 01:26:42,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:26:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 422 transitions. [2021-11-07 01:26:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:26:42,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:42,418 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:42,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:26:42,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:42,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:42,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 530496366, now seen corresponding path program 1 times [2021-11-07 01:26:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:42,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925568713] [2021-11-07 01:26:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:42,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:42,859 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:42,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:26:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:43,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:43,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:44,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:44,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925568713] [2021-11-07 01:26:44,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925568713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:44,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081995550] [2021-11-07 01:26:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:44,275 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:44,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:44,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:26:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:45,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:26:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081995550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:45,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231103576] [2021-11-07 01:26:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:45,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:26:45,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:26:45,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 01:26:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:46,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231103576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:47,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:26:47,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 01:26:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142547499] [2021-11-07 01:26:47,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:26:47,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:26:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:47,056 INFO L87 Difference]: Start difference. First operand 359 states and 422 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:47,347 INFO L93 Difference]: Finished difference Result 676 states and 805 transitions. [2021-11-07 01:26:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:26:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:26:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:47,350 INFO L225 Difference]: With dead ends: 676 [2021-11-07 01:26:47,350 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 01:26:47,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:26:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 01:26:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-11-07 01:26:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.178082191780822) internal successors, (430), 366 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 01:26:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 430 transitions. [2021-11-07 01:26:47,391 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 430 transitions. Word has length 113 [2021-11-07 01:26:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:47,391 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 430 transitions. [2021-11-07 01:26:47,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 430 transitions. [2021-11-07 01:26:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:26:47,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:47,393 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:47,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:47,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:47,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:48,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:48,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1097324242, now seen corresponding path program 2 times [2021-11-07 01:26:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:48,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495510] [2021-11-07 01:26:48,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:26:48,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:48,015 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:48,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:26:49,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:26:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:26:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:26:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:26:49,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:26:50,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:50,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495510] [2021-11-07 01:26:50,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:50,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [266032028] [2021-11-07 01:26:50,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:26:50,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:50,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:50,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:26:51,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:26:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:26:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:26:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:26:52,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:26:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [266032028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:52,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709299389] [2021-11-07 01:26:52,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:26:52,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:52,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:26:52,374 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:26:52,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:26:53,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:26:53,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:26:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:26:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:26:53,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:26:54,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709299389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:54,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:26:54,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 8] total 27 [2021-11-07 01:26:54,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570919477] [2021-11-07 01:26:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 01:26:54,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 01:26:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:26:54,760 INFO L87 Difference]: Start difference. First operand 367 states and 430 transitions. Second operand has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 01:26:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:58,872 INFO L93 Difference]: Finished difference Result 1003 states and 1202 transitions. [2021-11-07 01:26:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:26:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 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 121 [2021-11-07 01:26:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:58,879 INFO L225 Difference]: With dead ends: 1003 [2021-11-07 01:26:58,879 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 01:26:58,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:26:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 01:26:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 389. [2021-11-07 01:26:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.1705426356589148) internal successors, (453), 388 states have internal predecessors, (453), 0 states have call successors, (0), 0 states 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 01:26:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 453 transitions. [2021-11-07 01:26:58,908 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 453 transitions. Word has length 121 [2021-11-07 01:26:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 453 transitions. [2021-11-07 01:26:58,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 01:26:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 453 transitions. [2021-11-07 01:26:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:26:58,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:58,911 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:58,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:59,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:59,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:59,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:59,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1558698834, now seen corresponding path program 3 times [2021-11-07 01:26:59,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:59,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600609187] [2021-11-07 01:26:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:26:59,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:59,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:59,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:27:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:27:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:27:07,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:27:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:27:07,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:27:09,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:09,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600609187] [2021-11-07 01:27:09,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600609187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [153166395] [2021-11-07 01:27:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:27:09,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:09,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:09,697 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:09,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:27:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:27:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:27:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:27:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:27:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:27:55,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [153166395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:55,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121867147] [2021-11-07 01:27:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:27:55,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:55,561 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06643477-0719-4024-ba1a-abb8b49fe932/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process