./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 ........................................................................................................................................................................................................................................................................................................................................................................................................................ 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_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:37:27,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:37:27,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:37:27,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:37:27,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:37:27,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:37:27,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:37:27,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:37:27,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:37:27,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:37:27,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:37:27,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:37:27,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:37:27,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:37:27,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:37:27,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:37:27,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:37:27,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:37:27,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:37:27,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:37:27,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:37:27,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:37:27,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:37:27,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:37:27,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:37:27,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:37:27,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:37:27,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:37:27,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:37:27,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:37:27,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:37:27,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:37:27,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:37:27,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:37:27,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:37:27,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:37:27,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:37:27,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:37:27,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:37:27,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:37:27,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:37:27,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:37:27,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:37:27,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:37:27,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:37:27,617 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:37:27,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:37:27,617 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:37:27,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:37:27,618 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:37:27,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:37:27,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:37:27,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:37:27,620 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:37:27,620 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:37:27,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:37:27,621 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:37:27,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:37:27,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:37:27,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:37:27,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:37:27,623 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:37:27,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:37:27,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:37:27,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:37:27,624 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:37:27,624 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:37:27,625 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:37:27,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:37:27,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:37:27,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:37:27,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:37:27,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:37:27,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:37:27,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:37:27,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:37:27,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:37:27,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:37:27,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:37:27,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:37:27,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:37:27,629 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_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-10-13 07:37:27,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:37:27,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:37:27,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:37:27,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:37:27,970 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:37:27,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 07:37:28,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/29d0d3c54/30e8b54dcaf9465488c778dd650e0bbd/FLAG1f3061b64 [2021-10-13 07:37:28,645 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:37:28,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 07:37:28,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/29d0d3c54/30e8b54dcaf9465488c778dd650e0bbd/FLAG1f3061b64 [2021-10-13 07:37:28,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/29d0d3c54/30e8b54dcaf9465488c778dd650e0bbd [2021-10-13 07:37:28,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:37:28,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:37:28,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:37:28,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:37:28,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:37:28,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:37:28" (1/1) ... [2021-10-13 07:37:28,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7a1a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:28, skipping insertion in model container [2021-10-13 07:37:28,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:37:28" (1/1) ... [2021-10-13 07:37:28,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:37:28,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:37:29,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:37:29,364 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:37:29,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:37:29,443 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:37:29,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29 WrapperNode [2021-10-13 07:37:29,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:37:29,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:37:29,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:37:29,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:37:29,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:37:29,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:37:29,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:37:29,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:37:29,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:37:29,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:37:29,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:37:29,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:37:29,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (1/1) ... [2021-10-13 07:37:29,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:37:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:29,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:37:29,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:37:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:37:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:37:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:37:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:37:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:37:29,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:37:30,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:37:30,245 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:37:30,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:37:30 BoogieIcfgContainer [2021-10-13 07:37:30,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:37:30,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:37:30,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:37:30,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:37:30,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:37:28" (1/3) ... [2021-10-13 07:37:30,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117bc091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:37:30, skipping insertion in model container [2021-10-13 07:37:30,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:29" (2/3) ... [2021-10-13 07:37:30,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117bc091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:37:30, skipping insertion in model container [2021-10-13 07:37:30,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:37:30" (3/3) ... [2021-10-13 07:37:30,260 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-13 07:37:30,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:37:30,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-13 07:37:30,323 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:37:30,331 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, mConcurrency=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 [2021-10-13 07:37:30,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-13 07:37:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 20 states have (on average 2.45) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-10-13 07:37:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:37:30,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:30,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:37:30,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2021-10-13 07:37:30,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:30,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777919731] [2021-10-13 07:37:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:30,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:30,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:30,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777919731] [2021-10-13 07:37:30,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777919731] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:30,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:30,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:37:30,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115936871] [2021-10-13 07:37:30,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:37:30,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:37:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:37:30,650 INFO L87 Difference]: Start difference. First operand has 44 states, 20 states have (on average 2.45) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-13 07:37:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:30,735 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-13 07:37:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:37:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:37:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:30,747 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:37:30,747 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:37:30,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:37:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:37:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 07:37:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 2.1) internal successors, (42), 37 states have internal predecessors, (42), 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) [2021-10-13 07:37:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-10-13 07:37:30,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2021-10-13 07:37:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:30,788 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-10-13 07:37:30,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-13 07:37:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-10-13 07:37:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:37:30,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:30,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:37:30,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:37:30,790 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2021-10-13 07:37:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:30,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111595091] [2021-10-13 07:37:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:30,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:30,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:30,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111595091] [2021-10-13 07:37:30,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111595091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:30,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:30,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:37:30,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901419647] [2021-10-13 07:37:30,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:37:30,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:37:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:37:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:37:30,962 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-10-13 07:37:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:31,076 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-13 07:37:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:37:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:37:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:31,079 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:37:31,080 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 07:37:31,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:37:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 07:37:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-13 07:37:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 2.0) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-10-13 07:37:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-13 07:37:31,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2021-10-13 07:37:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:31,091 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-13 07:37:31,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-10-13 07:37:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-13 07:37:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:37:31,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:31,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 07:37:31,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:37:31,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash 151335175, now seen corresponding path program 1 times [2021-10-13 07:37:31,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:37:31,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820852353] [2021-10-13 07:37:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:31,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:37:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:31,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:37:31,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820852353] [2021-10-13 07:37:31,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820852353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:37:31,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689756135] [2021-10-13 07:37:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:31,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:31,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:31,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:31,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:37:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:31,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:37:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:31,408 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 8 treesize of output 7 [2021-10-13 07:37:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:31,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:31,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689756135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:37:31,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698176159] [2021-10-13 07:37:31,799 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-13 07:37:31,799 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:37:31,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:37:31,811 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:37:31,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:37:31,849 INFO L180 QuantifierPusher]: treesize reduction 58, result has 64.2 percent of original size [2021-10-13 07:37:31,856 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:37:31,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-13 07:37:31,861 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:37:31,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:37:31,878 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:37:31,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 07:37:31,891 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:37:31,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-10-13 07:37:31,914 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:37:31,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:37:31,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 07:37:31,942 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 [2021-10-13 07:37:31,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:37:31,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:37:31,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:37:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2021-10-13 07:37:31,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:37:31,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:37:31,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 07:37:31,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:31,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2021-10-13 07:37:31,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:37:31,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,964 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:37:31,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 07:37:31,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:37:31,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:31,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:37:31,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:37:31,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:191, output treesize:65 [2021-10-13 07:37:32,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:37:32,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:32,208 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_58| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:37:32,211 INFO L168 Benchmark]: Toolchain (without parser) took 3287.79 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 65.1 MB in the beginning and 89.6 MB in the end (delta: -24.4 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,212 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory was 69.8 MB in the beginning and 69.8 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:32,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.17 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 70.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,213 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.03 ms. Allocated memory is still 100.7 MB. Free memory was 70.7 MB in the beginning and 68.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,213 INFO L168 Benchmark]: Boogie Preprocessor took 55.11 ms. Allocated memory is still 100.7 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,214 INFO L168 Benchmark]: RCFGBuilder took 688.26 ms. Allocated memory is still 100.7 MB. Free memory was 67.0 MB in the beginning and 48.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,214 INFO L168 Benchmark]: TraceAbstraction took 1961.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.6 MB in the beginning and 89.6 MB in the end (delta: -41.9 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:32,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory was 69.8 MB in the beginning and 69.8 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 517.17 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 70.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.03 ms. Allocated memory is still 100.7 MB. Free memory was 70.7 MB in the beginning and 68.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.11 ms. Allocated memory is still 100.7 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 688.26 ms. Allocated memory is still 100.7 MB. Free memory was 67.0 MB in the beginning and 48.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1961.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.6 MB in the beginning and 89.6 MB in the end (delta: -41.9 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_58| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_58|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:37:32,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:37:34,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:37:34,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:37:34,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:37:34,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:37:34,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:37:34,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:37:34,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:37:34,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:37:34,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:37:34,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:37:34,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:37:34,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:37:34,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:37:34,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:37:34,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:37:34,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:37:34,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:37:34,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:37:34,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:37:34,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:37:34,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:37:34,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:37:34,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:37:34,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:37:34,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:37:34,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:37:34,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:37:34,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:37:34,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:37:34,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:37:34,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:37:34,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:37:34,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:37:34,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:37:34,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:37:34,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:37:34,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:37:34,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:37:34,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:37:34,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:37:34,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:37:34,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:37:34,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:37:34,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:37:34,910 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:37:34,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:37:34,910 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:37:34,911 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:37:34,911 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:37:34,911 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:37:34,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:37:34,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:37:34,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:37:34,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:37:34,914 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:37:34,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:37:34,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:37:34,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:37:34,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:37:34,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:37:34,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:37:34,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:37:34,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:37:34,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:37:34,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:37:34,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:37:34,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:37:34,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:37:34,918 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:37:34,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:37:34,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:37:34,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:37:34,919 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_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-10-13 07:37:35,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:37:35,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:37:35,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:37:35,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:37:35,345 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:37:35,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 07:37:35,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/3082f63bd/9317089f3510468496f15665e011a033/FLAG37bfe726d [2021-10-13 07:37:35,966 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:37:35,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 07:37:35,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/3082f63bd/9317089f3510468496f15665e011a033/FLAG37bfe726d [2021-10-13 07:37:36,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/data/3082f63bd/9317089f3510468496f15665e011a033 [2021-10-13 07:37:36,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:37:36,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:37:36,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:37:36,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:37:36,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:37:36,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422c7b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36, skipping insertion in model container [2021-10-13 07:37:36,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:37:36,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:37:36,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:37:36,737 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:37:36,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:37:36,831 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:37:36,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36 WrapperNode [2021-10-13 07:37:36,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:37:36,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:37:36,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:37:36,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:37:36,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:37:36,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:37:36,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:37:36,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:37:36,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:37:36,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:37:36,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:37:36,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:37:36,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (1/1) ... [2021-10-13 07:37:36,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:37:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:37,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:37:37,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:37:37,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:37:37,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:37:37,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:37:37,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:37:37,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:37:37,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:37:37,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:37:37,682 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:37:37,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:37:37 BoogieIcfgContainer [2021-10-13 07:37:37,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:37:37,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:37:37,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:37:37,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:37:37,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:37:36" (1/3) ... [2021-10-13 07:37:37,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66525971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:37:37, skipping insertion in model container [2021-10-13 07:37:37,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:37:36" (2/3) ... [2021-10-13 07:37:37,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66525971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:37:37, skipping insertion in model container [2021-10-13 07:37:37,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:37:37" (3/3) ... [2021-10-13 07:37:37,695 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-13 07:37:37,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:37:37,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-13 07:37:37,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:37:37,771 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, mConcurrency=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 [2021-10-13 07:37:37,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-13 07:37:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 59 states have internal predecessors, (69), 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) [2021-10-13 07:37:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:37:37,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:37,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:37,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-10-13 07:37:37,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:37,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703940615] [2021-10-13 07:37:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:37,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:37,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:37,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:37,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:37:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:37:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:38,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:38,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:37:38,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703940615] [2021-10-13 07:37:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703940615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:38,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:38,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:37:38,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444426543] [2021-10-13 07:37:38,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:37:38,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:37:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:37:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:37:38,122 INFO L87 Difference]: Start difference. First operand has 60 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-13 07:37:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:38,309 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-13 07:37:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:37:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:37:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:38,321 INFO L225 Difference]: With dead ends: 117 [2021-10-13 07:37:38,321 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:37:38,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:37:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:37:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 59. [2021-10-13 07:37:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 58 states have internal predecessors, (65), 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) [2021-10-13 07:37:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-10-13 07:37:38,358 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 7 [2021-10-13 07:37:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-10-13 07:37:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-13 07:37:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-10-13 07:37:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:37:38,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:38,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:38,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:38,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1805088678, now seen corresponding path program 1 times [2021-10-13 07:37:38,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:38,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339908940] [2021-10-13 07:37:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:38,573 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:38,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:38,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:37:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:37:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:38,693 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 [2021-10-13 07:37:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:38,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:38,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:37:38,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339908940] [2021-10-13 07:37:38,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339908940] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:38,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:38,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:37:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926537283] [2021-10-13 07:37:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:37:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:37:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:37:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:37:38,745 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-13 07:37:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:38,910 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-13 07:37:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:37:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:37:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:38,911 INFO L225 Difference]: With dead ends: 54 [2021-10-13 07:37:38,912 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 07:37:38,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:37:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 07:37:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-13 07:37:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 53 states have internal predecessors, (60), 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) [2021-10-13 07:37:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-13 07:37:38,919 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 7 [2021-10-13 07:37:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:38,919 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-13 07:37:38,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-13 07:37:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-13 07:37:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:37:38,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:38,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:38,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:39,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:39,121 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1805088679, now seen corresponding path program 1 times [2021-10-13 07:37:39,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:39,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879865828] [2021-10-13 07:37:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:39,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:39,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:39,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:37:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:37:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:39,281 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 [2021-10-13 07:37:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:39,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:37:39,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879865828] [2021-10-13 07:37:39,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879865828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:39,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:39,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:37:39,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733782824] [2021-10-13 07:37:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:37:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:37:39,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:37:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:37:39,595 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-13 07:37:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:40,586 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-10-13 07:37:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:37:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:37:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:40,588 INFO L225 Difference]: With dead ends: 152 [2021-10-13 07:37:40,588 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 07:37:40,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:37:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 07:37:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 58. [2021-10-13 07:37:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.625) internal successors, (65), 57 states have internal predecessors, (65), 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) [2021-10-13 07:37:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-13 07:37:40,597 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 7 [2021-10-13 07:37:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:40,598 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-13 07:37:40,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-13 07:37:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-13 07:37:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:37:40,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:40,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:40,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:37:40,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:40,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1241130414, now seen corresponding path program 1 times [2021-10-13 07:37:40,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:40,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563091136] [2021-10-13 07:37:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:40,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:40,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:37:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:37:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:41,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:37:41,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563091136] [2021-10-13 07:37:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563091136] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:37:41,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:41,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:37:41,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030985765] [2021-10-13 07:37:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:37:41,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:37:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:37:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:37:41,158 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-10-13 07:37:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:41,500 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-10-13 07:37:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:37:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:37:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:41,505 INFO L225 Difference]: With dead ends: 112 [2021-10-13 07:37:41,505 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 07:37:41,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:37:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 07:37:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 62. [2021-10-13 07:37:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 61 states have internal predecessors, (68), 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) [2021-10-13 07:37:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-10-13 07:37:41,513 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 9 [2021-10-13 07:37:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:41,513 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-10-13 07:37:41,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-10-13 07:37:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-10-13 07:37:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:37:41,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:41,515 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:41,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:41,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:41,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2021-10-13 07:37:41,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:41,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931821595] [2021-10-13 07:37:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:41,735 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:41,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:41,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:37:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:37:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:41,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:42,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:37:42,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931821595] [2021-10-13 07:37:42,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931821595] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:37:42,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793686983] [2021-10-13 07:37:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:42,011 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:37:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:37:42,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:37:42,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:37:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:37:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:42,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793686983] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:37:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417441181] [2021-10-13 07:37:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:42,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:42,283 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:37:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:37:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:42,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417441181] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:37:42,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:37:42,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 07:37:42,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324164508] [2021-10-13 07:37:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:37:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:37:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:37:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:37:42,473 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-10-13 07:37:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:42,698 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-13 07:37:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:37:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:37:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:42,700 INFO L225 Difference]: With dead ends: 111 [2021-10-13 07:37:42,700 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 07:37:42,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:37:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 07:37:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2021-10-13 07:37:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 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) [2021-10-13 07:37:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-13 07:37:42,707 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 11 [2021-10-13 07:37:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:42,707 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-13 07:37:42,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-10-13 07:37:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-13 07:37:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:37:42,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:42,710 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:42,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:42,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:43,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:37:43,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 19 more)] === [2021-10-13 07:37:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-10-13 07:37:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:43,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050706889] [2021-10-13 07:37:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:43,312 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:43,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:43,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:37:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:37:43,397 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:37:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:37:43,436 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:37:43,437 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:37:43,438 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:37:43,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:37:43,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:37:43,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:37:43,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:37:43,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:37:43,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:37:43,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:37:43,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:37:43,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:37:43,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:37:43,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:37:43,444 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:37:43,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:43,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:43,658 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:37:43,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:37:43 BoogieIcfgContainer [2021-10-13 07:37:43,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:37:43,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:37:43,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:37:43,696 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:37:43,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:37:37" (3/4) ... [2021-10-13 07:37:43,699 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:37:43,755 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:37:43,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:37:43,757 INFO L168 Benchmark]: Toolchain (without parser) took 7500.90 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 58.5 MB in the beginning and 79.1 MB in the end (delta: -20.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,757 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 49.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.45 ms. Allocated memory is still 79.7 MB. Free memory was 58.3 MB in the beginning and 56.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.23 ms. Allocated memory is still 79.7 MB. Free memory was 56.8 MB in the beginning and 54.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,759 INFO L168 Benchmark]: Boogie Preprocessor took 64.61 ms. Allocated memory is still 79.7 MB. Free memory was 54.6 MB in the beginning and 53.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,760 INFO L168 Benchmark]: RCFGBuilder took 704.48 ms. Allocated memory is still 79.7 MB. Free memory was 53.2 MB in the beginning and 38.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,761 INFO L168 Benchmark]: TraceAbstraction took 6009.69 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 38.2 MB in the beginning and 81.2 MB in the end (delta: -43.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:43,761 INFO L168 Benchmark]: Witness Printer took 59.18 ms. Allocated memory is still 113.2 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:43,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 49.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 574.45 ms. Allocated memory is still 79.7 MB. Free memory was 58.3 MB in the beginning and 56.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.23 ms. Allocated memory is still 79.7 MB. Free memory was 56.8 MB in the beginning and 54.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.61 ms. Allocated memory is still 79.7 MB. Free memory was 54.6 MB in the beginning and 53.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 704.48 ms. Allocated memory is still 79.7 MB. Free memory was 53.2 MB in the beginning and 38.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6009.69 ms. Allocated memory was 79.7 MB in the beginning and 113.2 MB in the end (delta: 33.6 MB). Free memory was 38.2 MB in the beginning and 81.2 MB in the end (delta: -43.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.18 ms. Allocated memory is still 113.2 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 523]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND TRUE length % 2 == 0 [L518] length++ [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() [L521] i++ [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 514]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 5895.1ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 22.2ms, AutomataDifference: 1960.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 299 SDtfs, 640 SDslu, 444 SDs, 0 SdLazy, 315 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1408.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 463.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 241 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.8ms SsaConstructionTime, 139.1ms SatisfiabilityAnalysisTime, 1340.7ms InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 471 SizeOfPredicates, 13 NumberOfNonLiveVariables, 181 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:37:43,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ecf3e-cbf4-4239-8a91-a0c5f37bc55e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...