./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0019-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI --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 e0c6505355e23ab050a0b1754726876dca60bcf4 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI --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 e0c6505355e23ab050a0b1754726876dca60bcf4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:31,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:31,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:31,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:31,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:31,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:31,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:31,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:31,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:31,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:31,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:31,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:31,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:31,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:31,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:31,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:31,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:31,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:31,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:31,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:31,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:31,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:31,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:31,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:31,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:31,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:31,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:31,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:31,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:31,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:31,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:31,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:31,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:31,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:31,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:31,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:31,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:31,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:31,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:31,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:31,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:31,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:23:31,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:31,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:31,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:31,707 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:31,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:31,707 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:31,707 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:31,708 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:31,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:31,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:31,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:31,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:31,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:31,710 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:31,710 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:31,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:23:31,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:23:31,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:31,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:31,712 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:23:31,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:31,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:31,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:31,713 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:23:31,713 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:23:31,714 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:23:31,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:31,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:31,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:31,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:31,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:31,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:31,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:31,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:31,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:31,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:31,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:31,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:31,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:31,719 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_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2021-10-11 02:23:32,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:32,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:32,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:32,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:32,057 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:32,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-11 02:23:32,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/0778f1a97/29c5acd6e01a409488e671ed3fb9e123/FLAGc56d6b52c [2021-10-11 02:23:32,759 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:32,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-11 02:23:32,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/0778f1a97/29c5acd6e01a409488e671ed3fb9e123/FLAGc56d6b52c [2021-10-11 02:23:33,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/0778f1a97/29c5acd6e01a409488e671ed3fb9e123 [2021-10-11 02:23:33,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:33,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:33,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:33,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:33,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:33,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e663d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33, skipping insertion in model container [2021-10-11 02:23:33,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:33,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:33,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:33,504 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:33,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:33,630 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:33,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33 WrapperNode [2021-10-11 02:23:33,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:33,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:33,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:33,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:33,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:33,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:33,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:33,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:33,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... [2021-10-11 02:23:33,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:33,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:33,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:33,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:33,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:33,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:23:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:23:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:23:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:23:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:33,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:34,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:34,215 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:23:34,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:34 BoogieIcfgContainer [2021-10-11 02:23:34,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:34,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:34,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:34,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:34,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:33" (1/3) ... [2021-10-11 02:23:34,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3692bd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:34, skipping insertion in model container [2021-10-11 02:23:34,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:33" (2/3) ... [2021-10-11 02:23:34,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3692bd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:34, skipping insertion in model container [2021-10-11 02:23:34,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:34" (3/3) ... [2021-10-11 02:23:34,228 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-11 02:23:34,243 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:34,246 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2021-10-11 02:23:34,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-11 02:23:34,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:34,297 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:23:34,299 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:34,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:34,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:34,302 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:34,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:34,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-10-11 02:23:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:23:34,340 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:34,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:23:34,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2515, now seen corresponding path program 1 times [2021-10-11 02:23:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155345714] [2021-10-11 02:23:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155345714] [2021-10-11 02:23:34,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:34,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:23:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911278360] [2021-10-11 02:23:34,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:34,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:34,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:34,651 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-10-11 02:23:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:34,753 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-11 02:23:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:34,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2021-10-11 02:23:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:34,767 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:23:34,768 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:23:34,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:23:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-10-11 02:23:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 02:23:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-11 02:23:34,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 2 [2021-10-11 02:23:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:34,816 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-11 02:23:34,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-11 02:23:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:23:34,817 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:34,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:23:34,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:34,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2516, now seen corresponding path program 1 times [2021-10-11 02:23:34,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:34,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721291308] [2021-10-11 02:23:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721291308] [2021-10-11 02:23:34,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:34,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:23:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513955841] [2021-10-11 02:23:34,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:34,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:34,901 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 3 states. [2021-10-11 02:23:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:34,932 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-11 02:23:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:34,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2021-10-11 02:23:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:34,937 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:23:34,937 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:23:34,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:23:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-11 02:23:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:23:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-11 02:23:34,947 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 2 [2021-10-11 02:23:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-11 02:23:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-11 02:23:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:23:34,949 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:34,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:23:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:23:34,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2467551, now seen corresponding path program 1 times [2021-10-11 02:23:34,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:34,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570009671] [2021-10-11 02:23:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:35,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570009671] [2021-10-11 02:23:35,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:35,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:35,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4371992] [2021-10-11 02:23:35,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:35,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:35,070 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 4 states. [2021-10-11 02:23:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:35,166 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-11 02:23:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:35,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:23:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:35,167 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:23:35,167 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:23:35,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:23:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-11 02:23:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:23:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-11 02:23:35,180 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 4 [2021-10-11 02:23:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:35,181 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-11 02:23:35,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-11 02:23:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:23:35,183 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:35,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:23:35,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:23:35,183 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:35,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2467552, now seen corresponding path program 1 times [2021-10-11 02:23:35,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:35,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76901340] [2021-10-11 02:23:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:35,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76901340] [2021-10-11 02:23:35,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:35,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:35,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455401935] [2021-10-11 02:23:35,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:35,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:35,288 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2021-10-11 02:23:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:35,327 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-11 02:23:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:35,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:23:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:35,328 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:23:35,328 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:23:35,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:23:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:23:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:23:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-11 02:23:35,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 4 [2021-10-11 02:23:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:35,332 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-11 02:23:35,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-11 02:23:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:35,333 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:35,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:35,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:23:35,334 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 497700460, now seen corresponding path program 1 times [2021-10-11 02:23:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:35,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418501989] [2021-10-11 02:23:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:35,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418501989] [2021-10-11 02:23:35,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:35,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:35,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179724688] [2021-10-11 02:23:35,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:35,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:35,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:35,430 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2021-10-11 02:23:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:35,540 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-10-11 02:23:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:35,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2021-10-11 02:23:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:35,544 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:23:35,544 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:23:35,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:23:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 02:23:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:23:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-11 02:23:35,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-10-11 02:23:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:35,555 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-11 02:23:35,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-11 02:23:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:35,556 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:35,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:35,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:23:35,557 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1751154868, now seen corresponding path program 1 times [2021-10-11 02:23:35,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:35,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504857025] [2021-10-11 02:23:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:35,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504857025] [2021-10-11 02:23:35,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:35,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:35,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405586999] [2021-10-11 02:23:35,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:35,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:35,694 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2021-10-11 02:23:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:35,833 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-11 02:23:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:23:35,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-10-11 02:23:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:35,834 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:23:35,835 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:23:35,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:23:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:23:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:23:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-11 02:23:35,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2021-10-11 02:23:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:35,841 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-11 02:23:35,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-11 02:23:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:23:35,842 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:35,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:35,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:23:35,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1549205321, now seen corresponding path program 1 times [2021-10-11 02:23:35,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:35,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654203736] [2021-10-11 02:23:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:35,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:35,925 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:35,955 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:35,955 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:35,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:23:35,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:35 BoogieIcfgContainer [2021-10-11 02:23:35,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:35,987 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:35,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:35,987 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:35,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:34" (3/4) ... [2021-10-11 02:23:35,990 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:23:35,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:35,992 INFO L168 Benchmark]: Toolchain (without parser) took 2927.54 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 91.4 MB in the beginning and 107.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:35,992 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 88.1 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:35,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.22 ms. Allocated memory is still 123.7 MB. Free memory was 91.1 MB in the beginning and 87.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:35,994 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.26 ms. Allocated memory is still 123.7 MB. Free memory was 87.7 MB in the beginning and 85.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:35,994 INFO L168 Benchmark]: Boogie Preprocessor took 31.88 ms. Allocated memory is still 123.7 MB. Free memory was 85.7 MB in the beginning and 84.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:35,995 INFO L168 Benchmark]: RCFGBuilder took 507.44 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 93.8 MB in the end (delta: -9.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:35,996 INFO L168 Benchmark]: TraceAbstraction took 1766.55 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 93.8 MB in the beginning and 107.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:35,996 INFO L168 Benchmark]: Witness Printer took 3.54 ms. Allocated memory is still 151.0 MB. Free memory is still 107.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:35,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 88.1 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 566.22 ms. Allocated memory is still 123.7 MB. Free memory was 91.1 MB in the beginning and 87.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.26 ms. Allocated memory is still 123.7 MB. Free memory was 87.7 MB in the beginning and 85.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.88 ms. Allocated memory is still 123.7 MB. Free memory was 85.7 MB in the beginning and 84.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 507.44 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 93.8 MB in the end (delta: -9.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1766.55 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 93.8 MB in the beginning and 107.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.54 ms. Allocated memory is still 151.0 MB. Free memory is still 107.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 247 SDslu, 19 SDs, 0 SdLazy, 106 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 844 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:38,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:38,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:38,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:38,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:38,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:38,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:38,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:38,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:38,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:38,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:38,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:38,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:38,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:38,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:38,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:38,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:38,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:38,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:38,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:38,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:38,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:38,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:38,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:38,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:38,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:38,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:38,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:38,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:38,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:38,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:38,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:38,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:38,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:38,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:38,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:38,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:38,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:38,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:38,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:38,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:38,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-11 02:23:38,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:38,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:38,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:38,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:38,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:38,709 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:38,710 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:38,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:38,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:38,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:23:38,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:23:38,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:38,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:38,713 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:23:38,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:23:38,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:38,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:38,715 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:23:38,715 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:23:38,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:38,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:38,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:38,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:23:38,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:38,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:38,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:38,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:38,717 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:23:38,717 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:23:38,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:38,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:38,718 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_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2021-10-11 02:23:39,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:39,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:39,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:39,130 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:39,131 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:39,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-11 02:23:39,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/f5115e474/c8a99cc1a84047fe84c8245507b901b3/FLAG32e858224 [2021-10-11 02:23:39,832 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:39,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-11 02:23:39,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/f5115e474/c8a99cc1a84047fe84c8245507b901b3/FLAG32e858224 [2021-10-11 02:23:40,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/data/f5115e474/c8a99cc1a84047fe84c8245507b901b3 [2021-10-11 02:23:40,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:40,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:40,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:40,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:40,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:40,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2991daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40, skipping insertion in model container [2021-10-11 02:23:40,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:40,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:40,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:40,495 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:40,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:40,590 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:40,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40 WrapperNode [2021-10-11 02:23:40,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:40,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:40,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:40,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:40,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:40,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:40,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:40,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:40,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... [2021-10-11 02:23:40,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:40,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:40,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:40,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:40,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:23:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:23:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:23:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:23:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:23:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:40,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:41,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:41,246 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:23:41,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:41 BoogieIcfgContainer [2021-10-11 02:23:41,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:41,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:41,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:41,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:41,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:40" (1/3) ... [2021-10-11 02:23:41,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c69fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:41, skipping insertion in model container [2021-10-11 02:23:41,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:40" (2/3) ... [2021-10-11 02:23:41,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c69fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:41, skipping insertion in model container [2021-10-11 02:23:41,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:41" (3/3) ... [2021-10-11 02:23:41,256 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-11 02:23:41,278 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:41,280 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2021-10-11 02:23:41,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-11 02:23:41,309 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:41,309 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:23:41,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:41,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:41,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:41,310 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:41,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:41,310 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-10-11 02:23:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:23:41,329 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:41,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:23:41,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-11 02:23:41,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:41,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726713142] [2021-10-11 02:23:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:41,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:23:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:41,609 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-11 02:23:41,609 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 02:23:41,613 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:41,622 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:41,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:41,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2021-10-11 02:23:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:41,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726713142] [2021-10-11 02:23:41,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:41,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:41,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503427123] [2021-10-11 02:23:41,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:41,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:41,690 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2021-10-11 02:23:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:41,831 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-10-11 02:23:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:41,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:23:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:41,840 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:23:41,840 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:23:41,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:23:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-10-11 02:23:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:23:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-11 02:23:41,873 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2021-10-11 02:23:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:41,874 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-11 02:23:41,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-11 02:23:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:23:41,874 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:41,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:23:42,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:23:42,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-11 02:23:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:42,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029277489] [2021-10-11 02:23:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:23:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:42,209 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_33|]} [2021-10-11 02:23:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:42,218 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 02:23:42,221 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:42,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:42,248 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-10-11 02:23:42,250 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:42,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:42,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:42,266 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2021-10-11 02:23:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:42,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:42,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029277489] [2021-10-11 02:23:42,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:42,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974308899] [2021-10-11 02:23:42,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:42,292 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 3 states. [2021-10-11 02:23:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:42,393 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-10-11 02:23:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:42,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:23:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:42,395 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:23:42,395 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:23:42,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:23:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-11 02:23:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:23:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-11 02:23:42,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 3 [2021-10-11 02:23:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:42,401 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-11 02:23:42,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-11 02:23:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:42,402 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:42,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:42,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:23:42,617 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-10-11 02:23:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:42,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005497896] [2021-10-11 02:23:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:23:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:42,766 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_34|]} [2021-10-11 02:23:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:42,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-11 02:23:42,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:42,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:42,814 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-10-11 02:23:42,819 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:42,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:42,841 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:42,841 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2021-10-11 02:23:42,955 INFO L443 ElimStorePlain]: Different costs {1=[|v_#valid_35|], 3=[|v_#length_23|]} [2021-10-11 02:23:42,970 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:42,970 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-10-11 02:23:42,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:42,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:43,043 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:43,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 46 [2021-10-11 02:23:43,061 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:43,111 INFO L625 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-10-11 02:23:43,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:43,123 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:14 [2021-10-11 02:23:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:43,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005497896] [2021-10-11 02:23:43,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:43,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:43,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589905973] [2021-10-11 02:23:43,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:43,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:43,169 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 5 states. [2021-10-11 02:23:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:43,355 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-10-11 02:23:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:43,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2021-10-11 02:23:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:43,358 INFO L225 Difference]: With dead ends: 36 [2021-10-11 02:23:43,358 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 02:23:43,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 02:23:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-11 02:23:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 02:23:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-10-11 02:23:43,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 5 [2021-10-11 02:23:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-10-11 02:23:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-10-11 02:23:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:43,364 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:43,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:43,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:23:43,582 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1803025027, now seen corresponding path program 1 times [2021-10-11 02:23:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:43,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749042850] [2021-10-11 02:23:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:23:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:43,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:43,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749042850] [2021-10-11 02:23:43,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:43,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131909772] [2021-10-11 02:23:43,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:43,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:43,695 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 5 states. [2021-10-11 02:23:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:43,887 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-11 02:23:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:43,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 02:23:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:43,889 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:23:43,889 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:23:43,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:23:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-11 02:23:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:23:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-11 02:23:43,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 7 [2021-10-11 02:23:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:43,895 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-11 02:23:43,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-11 02:23:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:43,895 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:43,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:44,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:23:44,107 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1803025028, now seen corresponding path program 1 times [2021-10-11 02:23:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:44,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354843058] [2021-10-11 02:23:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:23:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:44,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:44,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354843058] [2021-10-11 02:23:44,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:44,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:44,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68725287] [2021-10-11 02:23:44,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:44,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:44,274 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2021-10-11 02:23:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:44,429 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-11 02:23:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:44,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 02:23:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:44,430 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:23:44,431 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:23:44,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:23:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-11 02:23:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:23:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-11 02:23:44,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 7 [2021-10-11 02:23:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:44,435 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-11 02:23:44,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-11 02:23:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:44,436 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:44,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:44,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:23:44,653 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1591396527, now seen corresponding path program 1 times [2021-10-11 02:23:44,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:44,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367415925] [2021-10-11 02:23:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:23:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:44,783 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-11 02:23:44,786 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:44,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:44,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:44,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-10-11 02:23:44,844 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-11 02:23:44,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:44,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:44,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:44,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-10-11 02:23:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:44,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:44,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367415925] [2021-10-11 02:23:44,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:44,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:23:44,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106332513] [2021-10-11 02:23:44,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:23:44,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:44,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:23:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:44,903 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2021-10-11 02:23:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:45,429 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-10-11 02:23:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:23:45,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-10-11 02:23:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:45,430 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:23:45,430 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 02:23:45,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:23:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 02:23:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-11 02:23:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:23:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-10-11 02:23:45,434 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 12 [2021-10-11 02:23:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:45,434 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-10-11 02:23:45,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:23:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-10-11 02:23:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:23:45,435 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:45,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:45,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:23:45,650 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2088652025, now seen corresponding path program 1 times [2021-10-11 02:23:45,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:45,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875161896] [2021-10-11 02:23:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:23:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:45,872 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-11 02:23:45,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:45,896 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:45,899 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:45,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2021-10-11 02:23:46,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-11 02:23:46,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:46,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:46,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:23:46,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:11 [2021-10-11 02:23:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:46,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:46,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875161896] [2021-10-11 02:23:46,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:46,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:23:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81400399] [2021-10-11 02:23:46,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:23:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:23:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:46,204 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 10 states. [2021-10-11 02:23:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:47,310 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2021-10-11 02:23:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:23:47,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-10-11 02:23:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:47,310 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:23:47,310 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:23:47,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:23:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:23:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-10-11 02:23:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:23:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-11 02:23:47,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 13 [2021-10-11 02:23:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:47,313 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-11 02:23:47,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:23:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-11 02:23:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:23:47,314 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:47,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:47,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 02:23:47,515 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:47,515 INFO L82 PathProgramCache]: Analyzing trace with hash -323703277, now seen corresponding path program 1 times [2021-10-11 02:23:47,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:47,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462135311] [2021-10-11 02:23:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:23:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:47,614 INFO L382 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 [2021-10-11 02:23:47,615 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:47,624 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:23:47,652 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-11 02:23:47,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:47,665 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2021-10-11 02:23:47,709 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-10-11 02:23:47,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:47,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:47,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:5 [2021-10-11 02:23:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:47,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462135311] [2021-10-11 02:23:47,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:47,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:23:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137847367] [2021-10-11 02:23:47,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:23:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:23:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:47,771 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2021-10-11 02:23:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:48,384 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-11 02:23:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:23:48,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-10-11 02:23:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:48,387 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:23:48,387 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 02:23:48,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:23:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 02:23:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-10-11 02:23:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:23:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-10-11 02:23:48,390 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 14 [2021-10-11 02:23:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:48,390 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-10-11 02:23:48,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:23:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-10-11 02:23:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:23:48,391 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:48,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:48,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 02:23:48,592 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:23:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1431505607, now seen corresponding path program 1 times [2021-10-11 02:23:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:48,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406736192] [2021-10-11 02:23:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e3e4a-ae73-4af9-a1d9-049ea8074aa8/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:48,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:48,753 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:48,796 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:23:48,796 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:48,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2021-10-11 02:23:49,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:49 BoogieIcfgContainer [2021-10-11 02:23:49,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:49,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:49,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:49,048 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:49,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:41" (3/4) ... [2021-10-11 02:23:49,052 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:23:49,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:49,054 INFO L168 Benchmark]: Toolchain (without parser) took 8960.48 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 44.9 MB in the beginning and 64.9 MB in the end (delta: -20.0 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,056 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 52.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:49,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.50 ms. Allocated memory is still 62.9 MB. Free memory was 44.7 MB in the beginning and 34.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,061 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 62.9 MB. Free memory was 34.3 MB in the beginning and 32.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,061 INFO L168 Benchmark]: Boogie Preprocessor took 28.20 ms. Allocated memory is still 62.9 MB. Free memory was 32.3 MB in the beginning and 31.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,062 INFO L168 Benchmark]: RCFGBuilder took 583.63 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 31.6 MB in the end (delta: -643.5 kB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,064 INFO L168 Benchmark]: TraceAbstraction took 7798.03 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 31.0 MB in the beginning and 65.7 MB in the end (delta: -34.7 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,064 INFO L168 Benchmark]: Witness Printer took 4.97 ms. Allocated memory is still 86.0 MB. Free memory was 65.7 MB in the beginning and 64.9 MB in the end (delta: 814.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:49,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 52.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 496.50 ms. Allocated memory is still 62.9 MB. Free memory was 44.7 MB in the beginning and 34.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 62.9 MB. Free memory was 34.3 MB in the beginning and 32.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.20 ms. Allocated memory is still 62.9 MB. Free memory was 32.3 MB in the beginning and 31.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 583.63 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 31.6 MB in the end (delta: -643.5 kB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7798.03 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 31.0 MB in the beginning and 65.7 MB in the end (delta: -34.7 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.97 ms. Allocated memory is still 86.0 MB. Free memory was 65.7 MB in the beginning and 64.9 MB in the end (delta: 814.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 400 SDslu, 130 SDs, 0 SdLazy, 368 SolverSat, 66 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 56 ConstructedInterpolants, 15 QuantifiedInterpolants, 5008 SizeOfPredicates, 66 NumberOfNonLiveVariables, 463 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...