./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:48:24,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:48:24,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:48:24,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:48:24,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:48:24,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:48:24,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:48:24,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:48:24,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:48:24,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:48:24,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:48:24,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:48:24,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:48:24,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:48:24,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:48:24,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:48:24,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:48:24,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:48:24,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:48:24,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:48:24,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:48:24,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:48:24,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:48:24,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:48:24,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:48:24,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:48:24,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:48:24,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:48:24,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:48:24,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:48:24,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:48:24,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:48:24,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:48:24,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:48:24,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:48:24,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:48:24,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:48:24,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:48:24,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:48:24,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:48:24,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:48:24,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-10-24 09:48:24,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:48:24,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:48:24,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:48:24,516 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:48:24,516 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:48:24,516 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:48:24,517 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:48:24,517 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:48:24,517 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:48:24,517 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:48:24,517 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:48:24,518 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:48:24,518 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:48:24,518 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:48:24,518 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:48:24,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 09:48:24,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 09:48:24,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:48:24,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:48:24,520 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 09:48:24,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:48:24,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:48:24,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:48:24,521 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 09:48:24,521 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 09:48:24,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:48:24,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:48:24,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:48:24,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:48:24,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:48:24,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:48:24,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:48:24,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:48:24,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:48:24,523 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:48:24,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:48:24,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:48:24,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:48:24,524 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_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-24 09:48:24,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:48:24,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:48:24,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:48:24,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:48:24,805 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:48:24,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-24 09:48:24,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/0835e3de1/ab05a7548ad448408afae0ce2e056b56/FLAG0b4aec9e5 [2021-10-24 09:48:25,391 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:48:25,392 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-24 09:48:25,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/0835e3de1/ab05a7548ad448408afae0ce2e056b56/FLAG0b4aec9e5 [2021-10-24 09:48:25,760 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/0835e3de1/ab05a7548ad448408afae0ce2e056b56 [2021-10-24 09:48:25,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:48:25,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:48:25,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:48:25,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:48:25,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:48:25,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:48:25" (1/1) ... [2021-10-24 09:48:25,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3fb8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:25, skipping insertion in model container [2021-10-24 09:48:25,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:48:25" (1/1) ... [2021-10-24 09:48:25,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:48:25,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:48:25,975 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_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-24 09:48:25,988 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:25,991 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:26,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:48:26,020 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) [2021-10-24 09:48:26,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c97725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:26, skipping insertion in model container [2021-10-24 09:48:26,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:48:26,021 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 09:48:26,023 INFO L168 Benchmark]: Toolchain (without parser) took 257.48 ms. Allocated memory is still 111.1 MB. Free memory was 75.8 MB in the beginning and 88.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:26,024 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 50.6 MB in the beginning and 50.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:48:26,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.86 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 88.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:26,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 50.6 MB in the beginning and 50.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.86 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 88.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:48:28,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:48:28,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:48:28,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:48:28,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:48:28,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:48:28,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:48:28,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:48:28,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:48:28,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:48:28,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:48:28,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:48:28,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:48:28,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:48:28,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:48:28,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:48:28,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:48:28,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:48:28,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:48:28,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:48:28,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:48:28,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:48:28,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:48:28,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:48:28,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:48:28,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:48:28,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:48:28,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:48:28,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:48:28,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:48:28,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:48:28,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:48:28,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:48:28,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:48:28,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:48:28,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:48:28,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:48:28,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:48:28,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:48:28,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:48:28,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:48:28,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-10-24 09:48:28,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:48:28,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:48:28,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:48:28,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:48:28,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:48:28,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:48:28,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:48:28,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:48:28,631 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:48:28,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 09:48:28,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 09:48:28,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:48:28,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:48:28,634 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 09:48:28,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:48:28,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:48:28,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:48:28,635 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 09:48:28,635 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 09:48:28,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:48:28,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:48:28,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:48:28,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:48:28,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:48:28,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:48:28,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:48:28,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:48:28,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:48:28,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:48:28,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:48:28,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:48:28,638 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:48:28,638 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:48:28,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:48:28,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:48:28,639 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_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-24 09:48:29,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:48:29,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:48:29,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:48:29,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:48:29,064 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:48:29,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-24 09:48:29,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/e09e8cd9b/4780a43988b24f3596638621dde3f0bc/FLAGc11443630 [2021-10-24 09:48:29,761 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:48:29,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-24 09:48:29,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/e09e8cd9b/4780a43988b24f3596638621dde3f0bc/FLAGc11443630 [2021-10-24 09:48:30,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/data/e09e8cd9b/4780a43988b24f3596638621dde3f0bc [2021-10-24 09:48:30,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:48:30,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:48:30,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:48:30,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:48:30,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:48:30,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1925d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30, skipping insertion in model container [2021-10-24 09:48:30,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:48:30,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:48:30,298 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_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-24 09:48:30,328 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,333 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:48:30,435 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 09:48:30,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:48:30,464 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_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-24 09:48:30,481 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,485 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:48:30,527 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:48:30,540 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_066f0679-2a24-499d-b03b-34514615ad03/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-24 09:48:30,545 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,547 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:48:30,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:48:30,582 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:48:30,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30 WrapperNode [2021-10-24 09:48:30,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:48:30,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:48:30,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:48:30,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:48:30,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:48:30,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:48:30,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:48:30,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:48:30,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:48:30,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:48:30,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:48:30,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:48:30,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (1/1) ... [2021-10-24 09:48:30,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:48:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:48:30,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:48:30,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:48:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:48:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 09:48:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:48:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-24 09:48:30,826 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-24 09:48:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-24 09:48:30,826 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-24 09:48:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 09:48:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 09:48:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-24 09:48:30,827 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-24 09:48:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:48:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-24 09:48:30,827 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-24 09:48:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:48:30,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:48:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-24 09:48:30,828 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-24 09:48:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:48:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 09:48:31,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:48:31,655 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-24 09:48:31,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:48:31 BoogieIcfgContainer [2021-10-24 09:48:31,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:48:31,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:48:31,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:48:31,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:48:31,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:48:30" (1/3) ... [2021-10-24 09:48:31,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187e3b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:48:31, skipping insertion in model container [2021-10-24 09:48:31,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:48:30" (2/3) ... [2021-10-24 09:48:31,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187e3b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:48:31, skipping insertion in model container [2021-10-24 09:48:31,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:48:31" (3/3) ... [2021-10-24 09:48:31,667 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-24 09:48:31,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:48:31,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-10-24 09:48:31,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:48:31,729 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-24 09:48:31,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-10-24 09:48:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 94 states have (on average 1.7872340425531914) internal successors, (168), 152 states have internal predecessors, (168), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-10-24 09:48:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 09:48:31,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:31,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 09:48:31,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash 120451838, now seen corresponding path program 1 times [2021-10-24 09:48:31,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:31,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031220348] [2021-10-24 09:48:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:31,788 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:31,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:31,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:31,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:48:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:31,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:48:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:32,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:32,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:32,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:32,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031220348] [2021-10-24 09:48:32,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031220348] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:32,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:32,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 09:48:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684839679] [2021-10-24 09:48:32,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:48:32,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:32,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:48:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:48:32,102 INFO L87 Difference]: Start difference. First operand has 174 states, 94 states have (on average 1.7872340425531914) internal successors, (168), 152 states have internal predecessors, (168), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:32,440 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2021-10-24 09:48:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:48:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 09:48:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:32,453 INFO L225 Difference]: With dead ends: 175 [2021-10-24 09:48:32,454 INFO L226 Difference]: Without dead ends: 172 [2021-10-24 09:48:32,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:48:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-24 09:48:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2021-10-24 09:48:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 148 states have internal predecessors, (156), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-10-24 09:48:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 188 transitions. [2021-10-24 09:48:32,563 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 188 transitions. Word has length 5 [2021-10-24 09:48:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:32,563 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 188 transitions. [2021-10-24 09:48:32,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 188 transitions. [2021-10-24 09:48:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 09:48:32,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:32,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 09:48:32,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:32,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:32,766 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 120451839, now seen corresponding path program 1 times [2021-10-24 09:48:32,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:32,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677831193] [2021-10-24 09:48:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:32,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:32,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:32,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:48:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:48:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:32,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:32,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:32,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:32,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677831193] [2021-10-24 09:48:32,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677831193] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:32,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:32,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-24 09:48:32,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706580666] [2021-10-24 09:48:32,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:48:32,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:48:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:48:32,994 INFO L87 Difference]: Start difference. First operand 170 states and 188 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:33,468 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2021-10-24 09:48:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:48:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 09:48:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:33,473 INFO L225 Difference]: With dead ends: 169 [2021-10-24 09:48:33,473 INFO L226 Difference]: Without dead ends: 169 [2021-10-24 09:48:33,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:48:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-24 09:48:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-10-24 09:48:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 92 states have (on average 1.684782608695652) internal successors, (155), 147 states have internal predecessors, (155), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-10-24 09:48:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 187 transitions. [2021-10-24 09:48:33,494 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 187 transitions. Word has length 5 [2021-10-24 09:48:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:33,495 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 187 transitions. [2021-10-24 09:48:33,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 187 transitions. [2021-10-24 09:48:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:48:33,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:33,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:33,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:33,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:33,706 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1417576646, now seen corresponding path program 1 times [2021-10-24 09:48:33,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:33,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390786194] [2021-10-24 09:48:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:33,708 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:33,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:33,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:33,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:48:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:48:33,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:33,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:34,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:34,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390786194] [2021-10-24 09:48:34,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390786194] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:34,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:34,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-24 09:48:34,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115470633] [2021-10-24 09:48:34,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 09:48:34,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 09:48:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:48:34,110 INFO L87 Difference]: Start difference. First operand 169 states and 187 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-24 09:48:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:34,265 INFO L93 Difference]: Finished difference Result 242 states and 269 transitions. [2021-10-24 09:48:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 09:48:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-24 09:48:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:34,269 INFO L225 Difference]: With dead ends: 242 [2021-10-24 09:48:34,269 INFO L226 Difference]: Without dead ends: 242 [2021-10-24 09:48:34,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:48:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-24 09:48:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2021-10-24 09:48:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 153 states have internal predecessors, (160), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-10-24 09:48:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2021-10-24 09:48:34,289 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 11 [2021-10-24 09:48:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:34,289 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2021-10-24 09:48:34,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-24 09:48:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2021-10-24 09:48:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:48:34,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:34,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:34,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:34,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:34,501 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:34,502 INFO L82 PathProgramCache]: Analyzing trace with hash 909137839, now seen corresponding path program 1 times [2021-10-24 09:48:34,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:34,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510993777] [2021-10-24 09:48:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:34,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:34,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 09:48:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 09:48:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:34,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:34,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510993777] [2021-10-24 09:48:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510993777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:34,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:34,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 09:48:34,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121798647] [2021-10-24 09:48:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:48:34,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:48:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:48:34,813 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-24 09:48:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:35,425 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2021-10-24 09:48:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:48:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2021-10-24 09:48:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:35,428 INFO L225 Difference]: With dead ends: 175 [2021-10-24 09:48:35,428 INFO L226 Difference]: Without dead ends: 175 [2021-10-24 09:48:35,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:48:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-24 09:48:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-10-24 09:48:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 97 states have (on average 1.6288659793814433) internal successors, (158), 151 states have internal predecessors, (158), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-10-24 09:48:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-10-24 09:48:35,469 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 11 [2021-10-24 09:48:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-10-24 09:48:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-24 09:48:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-10-24 09:48:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:48:35,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:35,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:35,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:35,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:35,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash 909137840, now seen corresponding path program 1 times [2021-10-24 09:48:35,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:35,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043714349] [2021-10-24 09:48:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:35,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:35,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:35,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 09:48:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 09:48:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:35,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:35,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:36,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:36,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043714349] [2021-10-24 09:48:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043714349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:36,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:36,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 09:48:36,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930262255] [2021-10-24 09:48:36,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:48:36,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:48:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:48:36,192 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-24 09:48:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:37,426 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2021-10-24 09:48:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:48:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-10-24 09:48:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:37,430 INFO L225 Difference]: With dead ends: 187 [2021-10-24 09:48:37,430 INFO L226 Difference]: Without dead ends: 187 [2021-10-24 09:48:37,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:48:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-24 09:48:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-10-24 09:48:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 100 states have (on average 1.61) internal successors, (161), 153 states have internal predecessors, (161), 18 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (22), 19 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-24 09:48:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-24 09:48:37,449 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 11 [2021-10-24 09:48:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:37,450 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-24 09:48:37,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-24 09:48:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-24 09:48:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-24 09:48:37,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:37,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:37,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:37,667 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:37,667 INFO L82 PathProgramCache]: Analyzing trace with hash 856205360, now seen corresponding path program 1 times [2021-10-24 09:48:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:37,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830727803] [2021-10-24 09:48:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:37,668 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:37,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:37,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:37,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 09:48:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:48:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:37,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:38,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830727803] [2021-10-24 09:48:38,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830727803] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:38,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:38,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-24 09:48:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605111148] [2021-10-24 09:48:38,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 09:48:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 09:48:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:48:38,052 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-24 09:48:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:38,158 INFO L93 Difference]: Finished difference Result 248 states and 277 transitions. [2021-10-24 09:48:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 09:48:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-10-24 09:48:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:38,162 INFO L225 Difference]: With dead ends: 248 [2021-10-24 09:48:38,162 INFO L226 Difference]: Without dead ends: 248 [2021-10-24 09:48:38,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:48:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-24 09:48:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 202. [2021-10-24 09:48:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 118 states have (on average 1.5677966101694916) internal successors, (185), 171 states have internal predecessors, (185), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (26), 23 states have call predecessors, (26), 22 states have call successors, (26) [2021-10-24 09:48:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 233 transitions. [2021-10-24 09:48:38,176 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 233 transitions. Word has length 17 [2021-10-24 09:48:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:38,177 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 233 transitions. [2021-10-24 09:48:38,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-24 09:48:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 233 transitions. [2021-10-24 09:48:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-24 09:48:38,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:38,179 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:38,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 09:48:38,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:38,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:48:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1770542819, now seen corresponding path program 1 times [2021-10-24 09:48:38,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:38,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17793154] [2021-10-24 09:48:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:38,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:38,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:38,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 09:48:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 09:48:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:38,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:48:39,098 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 09:48:39,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-24 09:48:39,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 09:48:39,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-24 09:48:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:48:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:54,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:48:54,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 128 [2021-10-24 09:48:54,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:48:54,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 132 [2021-10-24 09:49:07,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:49:07,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 122 [2021-10-24 09:49:07,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:49:07,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 126 [2021-10-24 09:49:27,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20))))))))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from false [2021-10-24 09:49:29,544 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20))))))))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from true [2021-10-24 09:49:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:49:29,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:49:29,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17793154] [2021-10-24 09:49:29,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17793154] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:49:29,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374318084] [2021-10-24 09:49:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:49:29,672 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:49:29,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:49:29,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:49:29,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-24 09:49:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:49:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 09:49:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:49:30,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:49:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:49:30,409 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 09:49:30,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-24 09:49:30,427 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 09:49:30,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-24 09:49:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:49:30,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:49:50,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:49:50,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 122 [2021-10-24 09:49:50,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:49:50,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 126 [2021-10-24 09:50:05,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:50:05,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 126 [2021-10-24 09:50:05,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:50:05,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 130 [2021-10-24 09:50:21,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_8 (_ BitVec 32)) (v_nondet_tree_~n~0.base_26 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6))) (or (not (bvule .cse0 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_8))) (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_26))))) (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select (store |c_#length| v_nondet_tree_~n~0.base_26 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_8)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6) .cse1))))) is different from false [2021-10-24 09:50:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:50:21,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374318084] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:50:21,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154072375] [2021-10-24 09:50:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:50:21,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:50:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:50:21,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:50:21,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-24 09:50:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:50:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 09:50:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:50:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 09:50:26,449 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 09:50:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-24 09:50:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-24 09:50:27,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:50:29,897 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_8 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8) .cse0)) (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_10)) (exists ((v_nondet_tree_~n~0.base_31 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8) (select (store |c_old(#length)| v_nondet_tree_~n~0.base_31 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_10))))))) is different from false [2021-10-24 09:50:30,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:50:30,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 82 [2021-10-24 09:50:40,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:50:40,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 82 [2021-10-24 09:50:54,481 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_8 (_ BitVec 32)) (v_nondet_tree_~n~0.base_32 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8) .cse0)) (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_32 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_10)) (exists ((v_nondet_tree_~n~0.base_31 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_8) (select (store |c_old(#length)| v_nondet_tree_~n~0.base_31 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_10))))))) is different from false [2021-10-24 09:50:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2021-10-24 09:50:54,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154072375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:50:54,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:50:54,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 6] total 19 [2021-10-24 09:50:54,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436556209] [2021-10-24 09:50:54,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-24 09:50:54,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:50:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-24 09:50:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=149, Unknown=22, NotChecked=116, Total=342 [2021-10-24 09:50:54,570 INFO L87 Difference]: Start difference. First operand 202 states and 233 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 13 states have internal predecessors, (70), 10 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-24 09:56:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:56:02,730 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2021-10-24 09:56:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:56:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 13 states have internal predecessors, (70), 10 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) Word has length 35 [2021-10-24 09:56:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:56:02,747 INFO L225 Difference]: With dead ends: 135 [2021-10-24 09:56:02,748 INFO L226 Difference]: Without dead ends: 132 [2021-10-24 09:56:02,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 179 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 66560.2ms TimeCoverageRelationStatistics Valid=67, Invalid=167, Unknown=22, NotChecked=124, Total=380 [2021-10-24 09:56:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-24 09:56:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-10-24 09:56:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 116 states have internal predecessors, (119), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-24 09:56:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2021-10-24 09:56:02,755 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 35 [2021-10-24 09:56:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:56:02,755 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2021-10-24 09:56:02,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 13 states have internal predecessors, (70), 10 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-24 09:56:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2021-10-24 09:56:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-24 09:56:02,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:56:02,757 INFO L512 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] [2021-10-24 09:56:02,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 09:56:03,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-24 09:56:03,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-24 09:56:03,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 09:56:03,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 54 more)] === [2021-10-24 09:56:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:56:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1718410933, now seen corresponding path program 1 times [2021-10-24 09:56:03,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:56:03,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703513376] [2021-10-24 09:56:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:56:03,376 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:56:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:56:03,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:56:03,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 09:56:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:56:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 09:56:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:56:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:56:03,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:56:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:56:03,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:56:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703513376] [2021-10-24 09:56:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703513376] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:56:03,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:56:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 09:56:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165413989] [2021-10-24 09:56:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:56:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:56:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:56:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:56:03,927 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-24 09:56:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:56:03,935 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-10-24 09:56:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:56:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-10-24 09:56:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:56:03,936 INFO L225 Difference]: With dead ends: 20 [2021-10-24 09:56:03,936 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 09:56:03,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:56:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 09:56:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 09:56:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:56:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 09:56:03,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-24 09:56:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:56:03,937 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 09:56:03,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-24 09:56:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 09:56:03,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 09:56:03,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr2REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr4REQUIRES_VIOLATION [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr5REQUIRES_VIOLATION [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr6REQUIRES_VIOLATION [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr7REQUIRES_VIOLATION [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr11REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr12REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr13REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr14REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-24 09:56:03,943 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,944 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 09:56:03,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-24 09:56:03,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-24 09:56:03,948 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-24 09:56:03,948 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-24 09:56:03,948 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-24 09:56:03,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 09:56:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:56:04,169 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:56:04,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:56:04 BoogieIcfgContainer [2021-10-24 09:56:04,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:56:04,174 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:56:04,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:56:04,174 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:56:04,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:48:31" (3/4) ... [2021-10-24 09:56:04,180 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 09:56:04,189 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-24 09:56:04,189 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-24 09:56:04,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-24 09:56:04,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-24 09:56:04,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_del [2021-10-24 09:56:04,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2021-10-24 09:56:04,209 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-24 09:56:04,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-24 09:56:04,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 09:56:04,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:56:04,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:56:04,320 INFO L168 Benchmark]: Toolchain (without parser) took 454216.25 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 22.6 MB in the beginning and 27.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,321 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 48.2 MB. Free memory was 28.7 MB in the beginning and 28.7 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:56:04,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 477.84 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 37.9 MB in the end (delta: -15.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.36 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 36.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,322 INFO L168 Benchmark]: Boogie Preprocessor took 92.51 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 33.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,323 INFO L168 Benchmark]: RCFGBuilder took 910.27 ms. Allocated memory is still 58.7 MB. Free memory was 33.9 MB in the beginning and 38.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,323 INFO L168 Benchmark]: TraceAbstraction took 452513.26 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 37.8 MB in the beginning and 33.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,324 INFO L168 Benchmark]: Witness Printer took 145.51 ms. Allocated memory is still 86.0 MB. Free memory was 32.2 MB in the beginning and 27.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:56:04,332 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 48.2 MB. Free memory was 28.7 MB in the beginning and 28.7 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 477.84 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 37.9 MB in the end (delta: -15.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.36 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 36.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.51 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 33.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 910.27 ms. Allocated memory is still 58.7 MB. Free memory was 33.9 MB in the beginning and 38.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 452513.26 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 37.8 MB in the beginning and 33.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * Witness Printer took 145.51 ms. Allocated memory is still 86.0 MB. Free memory was 32.2 MB in the beginning and 27.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 101]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 174 locations, 58 error locations. Started 1 CEGAR loops. OverallTime: 452448.2ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 21.2ms, AutomataDifference: 311177.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1167 SDtfs, 649 SDslu, 3009 SDs, 0 SdLazy, 1216 SolverSat, 131 SolverUnsat, 150 SolverUnknown, 0 SolverNotchecked, 307804.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 314 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 66862.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 205.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 121 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 139.5ms SsaConstructionTime, 523.2ms SatisfiabilityAnalysisTime, 136989.2ms InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 362 ConstructedInterpolants, 86 QuantifiedInterpolants, 3355 SizeOfPredicates, 22 NumberOfNonLiveVariables, 982 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 196/250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 58 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-24 09:56:04,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066f0679-2a24-499d-b03b-34514615ad03/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...