./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe ............................................................................................................................................ 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:27:52,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:27:52,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:27:52,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:27:52,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:27:52,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:27:52,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:27:52,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:27:52,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:27:52,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:27:52,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:27:52,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:27:52,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:27:52,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:27:52,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:27:52,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:27:52,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:27:52,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:27:52,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:27:52,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:27:52,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:27:52,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:27:52,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:27:52,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:27:52,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:27:52,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:27:52,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:27:52,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:27:52,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:27:52,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:27:52,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:27:52,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:27:52,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:27:52,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:27:52,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:27:52,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:27:52,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:27:52,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:27:52,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:27:52,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:27:52,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:27:52,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-10-29 05:27:52,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:27:52,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:27:52,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:27:52,651 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:27:52,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:27:52,652 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:27:52,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:27:52,652 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:27:52,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:27:52,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:27:52,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:27:52,653 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:27:52,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:27:52,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:27:52,654 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:27:52,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:27:52,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:27:52,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:27:52,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:27:52,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:27:52,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:27:52,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:27:52,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:27:52,658 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:27:52,658 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:27:52,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:27:52,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:27:52,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:27:52,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:27:52,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:27:52,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:27:52,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:27:52,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:27:52,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:27:52,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:27:52,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:27:52,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:27:52,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:27:52,662 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2021-10-29 05:27:53,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:27:53,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:27:53,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:27:53,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:27:53,057 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:27:53,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-10-29 05:27:53,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/aba9e1c09/7840fe14e5c64bd6a2d7a4040eefe082/FLAG69149af6f [2021-10-29 05:27:53,847 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:27:53,848 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-10-29 05:27:53,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/aba9e1c09/7840fe14e5c64bd6a2d7a4040eefe082/FLAG69149af6f [2021-10-29 05:27:54,180 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/aba9e1c09/7840fe14e5c64bd6a2d7a4040eefe082 [2021-10-29 05:27:54,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:27:54,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:27:54,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:27:54,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:27:54,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:27:54,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:27:54" (1/1) ... [2021-10-29 05:27:54,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67182001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:27:54, skipping insertion in model container [2021-10-29 05:27:54,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:27:54" (1/1) ... [2021-10-29 05:27:54,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:27:54,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:27:54,457 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-10-29 05:27:54,487 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:27:54,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:27:54,528 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) [2021-10-29 05:27:54,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46e7ea07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:27:54, skipping insertion in model container [2021-10-29 05:27:54,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:27:54,529 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-29 05:27:54,533 INFO L168 Benchmark]: Toolchain (without parser) took 345.88 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 53.8 MB in the beginning and 90.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:27:54,534 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 40.2 MB in the beginning and 40.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:27:54,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.67 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 53.6 MB in the beginning and 90.9 MB in the end (delta: -37.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:27:54,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 40.2 MB in the beginning and 40.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.67 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 53.6 MB in the beginning and 90.9 MB in the end (delta: -37.2 MB). Peak memory consumption was 8.4 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-b2eff8b [2021-10-29 05:27:57,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:27:57,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:27:57,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:27:57,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:27:57,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:27:57,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:27:57,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:27:57,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:27:57,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:27:57,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:27:57,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:27:57,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:27:57,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:27:57,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:27:57,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:27:57,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:27:57,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:27:57,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:27:57,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:27:57,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:27:57,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:27:57,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:27:57,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:27:57,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:27:57,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:27:57,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:27:57,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:27:57,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:27:57,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:27:57,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:27:57,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:27:57,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:27:57,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:27:57,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:27:57,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:27:57,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:27:57,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:27:57,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:27:57,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:27:57,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:27:57,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-10-29 05:27:57,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:27:57,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:27:57,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:27:57,885 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:27:57,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:27:57,885 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:27:57,886 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:27:57,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:27:57,886 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:27:57,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:27:57,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:27:57,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:27:57,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:27:57,890 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:27:57,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:27:57,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:27:57,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:27:57,891 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:27:57,891 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:27:57,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:27:57,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:27:57,892 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:27:57,892 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:27:57,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:27:57,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:27:57,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:27:57,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:27:57,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:27:57,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:27:57,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:27:57,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:27:57,894 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:27:57,895 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:27:57,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:27:57,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:27:57,895 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2021-10-29 05:27:58,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:27:58,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:27:58,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:27:58,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:27:58,477 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:27:58,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-10-29 05:27:58,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/61260fd59/a4eb9b09a94345b48e984b119455ed6e/FLAG0184c4fe8 [2021-10-29 05:27:59,367 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:27:59,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-10-29 05:27:59,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/61260fd59/a4eb9b09a94345b48e984b119455ed6e/FLAG0184c4fe8 [2021-10-29 05:27:59,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/data/61260fd59/a4eb9b09a94345b48e984b119455ed6e [2021-10-29 05:27:59,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:27:59,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:27:59,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:27:59,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:27:59,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:27:59,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:27:59" (1/1) ... [2021-10-29 05:27:59,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e3e8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:27:59, skipping insertion in model container [2021-10-29 05:27:59,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:27:59" (1/1) ... [2021-10-29 05:27:59,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:27:59,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:28:00,042 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-10-29 05:28:00,070 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:28:00,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:00,127 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-29 05:28:00,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:28:00,141 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-10-29 05:28:00,155 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:28:00,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:00,215 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:28:00,256 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_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-10-29 05:28:00,287 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:28:00,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:00,352 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:28:00,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00 WrapperNode [2021-10-29 05:28:00,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:28:00,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:00,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:28:00,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:28:00,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:00,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:28:00,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:28:00,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:28:00,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:28:00,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:28:00,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:28:00,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:28:00,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (1/1) ... [2021-10-29 05:28:00,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:28:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:28:00,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:28:00,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:28:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:28:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:28:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:28:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-29 05:28:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-29 05:28:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:28:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:28:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-29 05:28:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-29 05:28:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:28:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-29 05:28:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-29 05:28:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:28:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:28:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-29 05:28:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-29 05:28:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:28:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-29 05:28:02,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:28:02,275 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-29 05:28:02,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:02 BoogieIcfgContainer [2021-10-29 05:28:02,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:28:02,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:28:02,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:28:02,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:28:02,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:27:59" (1/3) ... [2021-10-29 05:28:02,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649f85c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:02, skipping insertion in model container [2021-10-29 05:28:02,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:00" (2/3) ... [2021-10-29 05:28:02,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649f85c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:02, skipping insertion in model container [2021-10-29 05:28:02,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:02" (3/3) ... [2021-10-29 05:28:02,291 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-10-29 05:28:02,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:28:02,299 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-10-29 05:28:02,354 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:28:02,361 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 [2021-10-29 05:28:02,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-10-29 05:28:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 104 states have (on average 1.8173076923076923) internal successors, (189), 171 states have internal predecessors, (189), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-29 05:28:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:28:02,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:02,401 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:28:02,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:02,410 INFO L85 PathProgramCache]: Analyzing trace with hash 88067099, now seen corresponding path program 1 times [2021-10-29 05:28:02,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:02,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266985345] [2021-10-29 05:28:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:02,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:02,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:02,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:28:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:28:02,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:02,707 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 [2021-10-29 05:28:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:02,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:02,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266985345] [2021-10-29 05:28:02,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266985345] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:02,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:02,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:28:02,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104859826] [2021-10-29 05:28:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:28:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:28:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:28:02,795 INFO L87 Difference]: Start difference. First operand has 190 states, 104 states have (on average 1.8173076923076923) internal successors, (189), 171 states have internal predecessors, (189), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2021-10-29 05:28:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:03,228 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2021-10-29 05:28:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:28:03,231 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 [2021-10-29 05:28:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:03,248 INFO L225 Difference]: With dead ends: 191 [2021-10-29 05:28:03,249 INFO L226 Difference]: Without dead ends: 188 [2021-10-29 05:28:03,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:28:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-29 05:28:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-10-29 05:28:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 102 states have (on average 1.7254901960784315) internal successors, (176), 167 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-29 05:28:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 204 transitions. [2021-10-29 05:28:03,341 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 204 transitions. Word has length 5 [2021-10-29 05:28:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:03,341 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 204 transitions. [2021-10-29 05:28:03,342 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) [2021-10-29 05:28:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 204 transitions. [2021-10-29 05:28:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:28:03,344 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:03,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:28:03,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:03,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:03,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash 88067100, now seen corresponding path program 1 times [2021-10-29 05:28:03,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:03,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033124914] [2021-10-29 05:28:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:03,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:03,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:03,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:28:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:28:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:03,745 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 [2021-10-29 05:28:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:03,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:03,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:03,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033124914] [2021-10-29 05:28:03,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033124914] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:03,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:03,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-29 05:28:03,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092360206] [2021-10-29 05:28:03,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:28:03,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:28:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:28:03,873 INFO L87 Difference]: Start difference. First operand 186 states and 204 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) [2021-10-29 05:28:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:04,712 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-10-29 05:28:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:28:04,714 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 [2021-10-29 05:28:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:04,717 INFO L225 Difference]: With dead ends: 185 [2021-10-29 05:28:04,717 INFO L226 Difference]: Without dead ends: 185 [2021-10-29 05:28:04,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:28:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-29 05:28:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-10-29 05:28:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 102 states have (on average 1.7156862745098038) internal successors, (175), 166 states have internal predecessors, (175), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-29 05:28:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 203 transitions. [2021-10-29 05:28:04,739 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 203 transitions. Word has length 5 [2021-10-29 05:28:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 203 transitions. [2021-10-29 05:28:04,740 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) [2021-10-29 05:28:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 203 transitions. [2021-10-29 05:28:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:28:04,747 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:04,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:04,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-29 05:28:04,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:04,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 399009253, now seen corresponding path program 1 times [2021-10-29 05:28:04,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:04,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990093639] [2021-10-29 05:28:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:04,969 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:04,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:04,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:28:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:28:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:05,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:05,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:05,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990093639] [2021-10-29 05:28:05,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990093639] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:05,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:05,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-29 05:28:05,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147568782] [2021-10-29 05:28:05,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:28:05,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:28:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:28:05,472 INFO L87 Difference]: Start difference. First operand 185 states and 203 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) [2021-10-29 05:28:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:05,666 INFO L93 Difference]: Finished difference Result 306 states and 334 transitions. [2021-10-29 05:28:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:28:05,668 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 [2021-10-29 05:28:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:05,672 INFO L225 Difference]: With dead ends: 306 [2021-10-29 05:28:05,673 INFO L226 Difference]: Without dead ends: 306 [2021-10-29 05:28:05,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:28:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-29 05:28:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 193. [2021-10-29 05:28:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 107 states have (on average 1.6822429906542056) internal successors, (180), 172 states have internal predecessors, (180), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-10-29 05:28:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 213 transitions. [2021-10-29 05:28:05,736 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 213 transitions. Word has length 11 [2021-10-29 05:28:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:05,737 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 213 transitions. [2021-10-29 05:28:05,737 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) [2021-10-29 05:28:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 213 transitions. [2021-10-29 05:28:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:28:05,738 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:05,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:05,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:05,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:05,954 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -880475284, now seen corresponding path program 1 times [2021-10-29 05:28:05,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:05,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251474438] [2021-10-29 05:28:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:05,957 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:05,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:05,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:05,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:28:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 05:28:06,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:06,121 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 [2021-10-29 05:28:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:06,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:06,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:06,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251474438] [2021-10-29 05:28:06,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251474438] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:06,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:06,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:28:06,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933167653] [2021-10-29 05:28:06,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:28:06,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:28:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:28:06,354 INFO L87 Difference]: Start difference. First operand 193 states and 213 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) [2021-10-29 05:28:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:07,152 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-10-29 05:28:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:28:07,153 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 [2021-10-29 05:28:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:07,155 INFO L225 Difference]: With dead ends: 191 [2021-10-29 05:28:07,155 INFO L226 Difference]: Without dead ends: 191 [2021-10-29 05:28:07,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:28:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-29 05:28:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-10-29 05:28:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 107 states have (on average 1.6635514018691588) internal successors, (178), 170 states have internal predecessors, (178), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-10-29 05:28:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-10-29 05:28:07,176 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 11 [2021-10-29 05:28:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:07,176 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-10-29 05:28:07,177 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) [2021-10-29 05:28:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-10-29 05:28:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:28:07,180 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:07,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:07,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:07,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:07,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash -880475283, now seen corresponding path program 1 times [2021-10-29 05:28:07,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:07,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095710900] [2021-10-29 05:28:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:07,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:07,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:07,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:07,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:28:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:28:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:07,581 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 [2021-10-29 05:28:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:07,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:08,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:08,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095710900] [2021-10-29 05:28:08,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095710900] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:08,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:08,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-29 05:28:08,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855245358] [2021-10-29 05:28:08,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:28:08,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:28:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:28:08,147 INFO L87 Difference]: Start difference. First operand 191 states and 211 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) [2021-10-29 05:28:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:09,666 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2021-10-29 05:28:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:28:09,667 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 [2021-10-29 05:28:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:09,670 INFO L225 Difference]: With dead ends: 203 [2021-10-29 05:28:09,670 INFO L226 Difference]: Without dead ends: 203 [2021-10-29 05:28:09,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:28:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-29 05:28:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2021-10-29 05:28:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 172 states have internal predecessors, (181), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (20), 17 states have call predecessors, (20), 16 states have call successors, (20) [2021-10-29 05:28:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-10-29 05:28:09,697 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 11 [2021-10-29 05:28:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:09,697 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-10-29 05:28:09,698 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) [2021-10-29 05:28:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-10-29 05:28:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 05:28:09,700 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:09,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:09,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:09,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:09,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 639504337, now seen corresponding path program 1 times [2021-10-29 05:28:09,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:09,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663908966] [2021-10-29 05:28:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:09,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:09,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:28:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:28:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:28:10,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:10,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663908966] [2021-10-29 05:28:10,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663908966] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:10,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:10,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-29 05:28:10,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718280606] [2021-10-29 05:28:10,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:28:10,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:28:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:28:10,460 INFO L87 Difference]: Start difference. First operand 195 states and 217 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) [2021-10-29 05:28:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:10,634 INFO L93 Difference]: Finished difference Result 312 states and 342 transitions. [2021-10-29 05:28:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:28:10,635 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 [2021-10-29 05:28:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:10,647 INFO L225 Difference]: With dead ends: 312 [2021-10-29 05:28:10,647 INFO L226 Difference]: Without dead ends: 312 [2021-10-29 05:28:10,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:28:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-29 05:28:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 242. [2021-10-29 05:28:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 153 states have (on average 1.673202614379085) internal successors, (256), 215 states have internal predecessors, (256), 19 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2021-10-29 05:28:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 298 transitions. [2021-10-29 05:28:10,666 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 298 transitions. Word has length 17 [2021-10-29 05:28:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:10,667 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 298 transitions. [2021-10-29 05:28:10,667 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) [2021-10-29 05:28:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 298 transitions. [2021-10-29 05:28:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 05:28:10,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:10,670 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:10,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:10,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:10,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:28:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash 667690905, now seen corresponding path program 1 times [2021-10-29 05:28:10,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:10,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585052282] [2021-10-29 05:28:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:10,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:10,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:28:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 05:28:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:11,318 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 [2021-10-29 05:28:11,327 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 [2021-10-29 05:28:11,810 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 05:28:11,811 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 [2021-10-29 05:28:11,829 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-29 05:28:11,830 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 [2021-10-29 05:28:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:28:11,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:30,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:28:30,969 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 [2021-10-29 05:28:31,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:28:31,021 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 [2021-10-29 05:28:48,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:28:48,438 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 [2021-10-29 05:28:48,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:28:48,485 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 [2021-10-29 05:29:14,511 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 [2021-10-29 05:29:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:29:14,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:29:14,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585052282] [2021-10-29 05:29:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585052282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:29:14,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215309735] [2021-10-29 05:29:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:29:14,668 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-29 05:29:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/cvc4 [2021-10-29 05:29:14,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-29 05:29:14,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-29 05:29:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:29:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 05:29:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:29:15,209 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 [2021-10-29 05:29:15,217 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 [2021-10-29 05:29:15,547 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 05:29:15,547 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 [2021-10-29 05:29:15,564 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-29 05:29:15,565 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 [2021-10-29 05:29:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:29:15,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:29:22,395 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))) (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)))))))) (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6))) (and (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6) .cse1) (bvule .cse1 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_8)))))) is different from false [2021-10-29 05:29:24,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:29:24,314 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 [2021-10-29 05:29:24,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:29:24,344 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 [2021-10-29 05:29:43,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:29:43,280 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 [2021-10-29 05:29:43,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:29:43,312 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 [2021-10-29 05:30:02,837 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 [2021-10-29 05:30:04,856 WARN L860 $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 true [2021-10-29 05:30:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 0 refuted. 4 times theorem prover too weak. 6 trivial. 4 not checked. [2021-10-29 05:30:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215309735] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:30:05,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230440054] [2021-10-29 05:30:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:30:05,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:30:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:30:05,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:30:05,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 05:30:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:30:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 05:30:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:30:05,484 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 [2021-10-29 05:30:09,151 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 05:30:09,152 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 [2021-10-29 05:30:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:30:10,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:30:26,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:30:26,382 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 [2021-10-29 05:30:39,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:30:39,038 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 [2021-10-29 05:31:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 6 refuted. 7 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 05:31:10,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230440054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:31:10,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-29 05:31:10,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 6] total 19 [2021-10-29 05:31:10,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660117624] [2021-10-29 05:31:10,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-29 05:31:10,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:31:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-29 05:31:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=167, Unknown=24, NotChecked=90, Total=342 [2021-10-29 05:31:10,870 INFO L87 Difference]: Start difference. First operand 242 states and 298 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-29 05:31:21,381 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_27 (_ BitVec 32)) (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 .cse0 v_arrayElimCell_27)) (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)) (not (bvule .cse0 (_ bv12 32))) (exists ((v_prenex_16 (_ BitVec 32)) (v_prenex_17 (_ BitVec 32))) (let ((.cse1 (bvadd v_prenex_16 (_ bv8 32))) (.cse2 (bvadd (_ bv8 32) v_prenex_16))) (and (bvule .cse1 (_ bv12 32)) (bvule (bvadd (_ bv4 32) v_prenex_16) .cse2) (bvule .cse1 v_arrayElimCell_27) (not (bvule .cse2 (select |c_old(#length)| v_prenex_17))))))))) (= (select |c_#length| c_nondet_tree_~n~0.base) (_ bv12 32)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| nondet_tree_~n~0.base)))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| c_nondet_tree_~n~0.base))) (= c_nondet_tree_~n~0.offset (_ bv0 32))) is different from false [2021-10-29 05:33:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:02,089 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2021-10-29 05:33:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:33:02,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) Word has length 35 [2021-10-29 05:33:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:02,091 INFO L225 Difference]: With dead ends: 151 [2021-10-29 05:33:02,092 INFO L226 Difference]: Without dead ends: 148 [2021-10-29 05:33:02,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=74, Invalid=187, Unknown=27, NotChecked=132, Total=420 [2021-10-29 05:33:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-29 05:33:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-29 05:33:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 85 states have (on average 1.6352941176470588) internal successors, (139), 135 states have internal predecessors, (139), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-29 05:33:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 155 transitions. [2021-10-29 05:33:02,099 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 155 transitions. Word has length 35 [2021-10-29 05:33:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:02,100 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 155 transitions. [2021-10-29 05:33:02,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-29 05:33:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 155 transitions. [2021-10-29 05:33:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:33:02,101 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:02,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:02,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:02,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:02,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:02,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:33:02,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr1REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-10-29 05:33:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 119143892, now seen corresponding path program 1 times [2021-10-29 05:33:02,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:33:02,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762522317] [2021-10-29 05:33:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:02,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:33:02,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:33:02,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:33:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-29 05:33:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:02,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:33:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:33:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:33:03,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:33:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:33:03,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:33:03,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762522317] [2021-10-29 05:33:03,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762522317] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:03,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:03,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 05:33:03,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104140988] [2021-10-29 05:33:03,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:33:03,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:33:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:33:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:33:03,258 INFO L87 Difference]: Start difference. First operand 148 states and 155 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) [2021-10-29 05:33:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:03,269 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-10-29 05:33:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:33:03,270 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 [2021-10-29 05:33:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:03,270 INFO L225 Difference]: With dead ends: 20 [2021-10-29 05:33:03,271 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 05:33:03,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:33:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 05:33:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 05:33:03,271 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) [2021-10-29 05:33:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 05:33:03,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-29 05:33:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:03,272 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 05:33:03,272 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) [2021-10-29 05:33:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 05:33:03,272 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 05:33:03,275 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-29 05:33:03,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-29 05:33:03,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-29 05:33:03,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-29 05:33:03,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:33:03,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:33:03,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:33:03,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-29 05:33:03,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-29 05:33:03,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-29 05:33:03,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-29 05:33:03,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-29 05:33:03,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-29 05:33:03,284 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-29 05:33:03,284 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:33:03,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:33:03,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-29 05:33:03,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-29 05:33:03,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-29 05:33:03,285 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-29 05:33:03,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:33:03,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,286 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,287 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,287 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,287 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:33:03,287 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:33:03,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-29 05:33:03,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-29 05:33:03,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-29 05:33:03,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-29 05:33:03,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-29 05:33:03,289 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-29 05:33:03,289 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-29 05:33:03,289 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-29 05:33:03,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:33:03,508 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:03,510 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:33:03,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:33:03 BoogieIcfgContainer [2021-10-29 05:33:03,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:33:03,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:33:03,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:33:03,515 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:33:03,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:02" (3/4) ... [2021-10-29 05:33:03,519 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 05:33:03,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-29 05:33:03,528 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-29 05:33:03,528 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-29 05:33:03,528 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-29 05:33:03,538 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2021-10-29 05:33:03,539 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-29 05:33:03,540 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-29 05:33:03,540 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:33:03,628 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:33:03,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:33:03,629 INFO L168 Benchmark]: Toolchain (without parser) took 303891.74 ms. Allocated memory was 50.3 MB in the beginning and 75.5 MB in the end (delta: 25.2 MB). Free memory was 27.2 MB in the beginning and 29.4 MB in the end (delta: -2.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,630 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:33:03,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 617.04 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 26.9 MB in the beginning and 43.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,631 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.66 ms. Allocated memory is still 62.9 MB. Free memory was 43.9 MB in the beginning and 41.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,631 INFO L168 Benchmark]: Boogie Preprocessor took 83.38 ms. Allocated memory is still 62.9 MB. Free memory was 41.8 MB in the beginning and 39.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,632 INFO L168 Benchmark]: RCFGBuilder took 1723.98 ms. Allocated memory is still 62.9 MB. Free memory was 39.4 MB in the beginning and 43.3 MB in the end (delta: -3.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,632 INFO L168 Benchmark]: TraceAbstraction took 301232.52 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 43.0 MB in the beginning and 35.5 MB in the end (delta: 7.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,633 INFO L168 Benchmark]: Witness Printer took 113.28 ms. Allocated memory is still 75.5 MB. Free memory was 35.3 MB in the beginning and 29.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:03,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 617.04 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 26.9 MB in the beginning and 43.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.66 ms. Allocated memory is still 62.9 MB. Free memory was 43.9 MB in the beginning and 41.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.38 ms. Allocated memory is still 62.9 MB. Free memory was 41.8 MB in the beginning and 39.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1723.98 ms. Allocated memory is still 62.9 MB. Free memory was 39.4 MB in the beginning and 43.3 MB in the end (delta: -3.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 301232.52 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 43.0 MB in the beginning and 35.5 MB in the end (delta: 7.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. * Witness Printer took 113.28 ms. Allocated memory is still 75.5 MB. Free memory was 35.3 MB in the beginning and 29.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.3 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: 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: 82]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 82]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 82]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 82]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 93]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 93]: 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: 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: 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: 56]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 56]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 56]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 58]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 58]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 60]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 60]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 62]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 62]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 62]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 62]: 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: 65]: 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: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 104]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 104]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 104]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 104]: 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: 105]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 105]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 105]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 106]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 106]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 106]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 109]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 73]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 73]: 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: 75]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 75]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 190 locations, 67 error locations. Started 1 CEGAR loops. OverallTime: 301.1s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 115.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1320 SDtfs, 711 SDslu, 3575 SDs, 0 SdLazy, 1144 SolverSat, 114 SolverUnsat, 49 SolverUnknown, 0 SolverNotchecked, 107.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 315 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 97.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=242occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 193 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 181.0s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 362 ConstructedInterpolants, 86 QuantifiedInterpolants, 3352 SizeOfPredicates, 22 NumberOfNonLiveVariables, 982 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 193/250 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 67 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-29 05:33:03,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef919b3-4522-4d1c-b9e1-c4f3620e4c6d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...