./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.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-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan --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 c8e64c1324249ca9b9e3c019cfc2046542af7b26 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan --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 c8e64c1324249ca9b9e3c019cfc2046542af7b26 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f2489c --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:39:50,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:39:50,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:39:50,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:39:50,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:39:50,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:39:50,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:39:50,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:39:50,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:39:50,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:39:50,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:39:50,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:39:50,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:39:50,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:39:50,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:39:50,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:39:50,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:39:50,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:39:50,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:39:50,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:39:50,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:39:50,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:39:50,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:39:50,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:39:50,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:39:50,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:39:50,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:39:50,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:39:50,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:39:50,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:39:50,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:39:50,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:39:50,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:39:50,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:39:50,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:39:50,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:39:50,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:39:50,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:39:50,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:39:50,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:39:50,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:39:50,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 04:39:50,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:39:50,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:39:50,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:39:50,182 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:39:50,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:39:50,182 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:39:50,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:39:50,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:39:50,183 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:39:50,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 04:39:50,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 04:39:50,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:39:50,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:39:50,184 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 04:39:50,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:39:50,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:39:50,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:50,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:39:50,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:39:50,187 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-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e64c1324249ca9b9e3c019cfc2046542af7b26 [2020-12-09 04:39:50,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:39:50,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:39:50,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:39:50,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:39:50,377 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:39:50,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2020-12-09 04:39:50,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/d3fbecb44/ab6698de89884e5d8c23d0ad69540aca/FLAG29e70fc66 [2020-12-09 04:39:50,852 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:39:50,853 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2020-12-09 04:39:50,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/d3fbecb44/ab6698de89884e5d8c23d0ad69540aca/FLAG29e70fc66 [2020-12-09 04:39:50,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/d3fbecb44/ab6698de89884e5d8c23d0ad69540aca [2020-12-09 04:39:50,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:39:50,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:39:50,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:50,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:39:50,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:39:50,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:50" (1/1) ... [2020-12-09 04:39:50,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e805ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:50, skipping insertion in model container [2020-12-09 04:39:50,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:50" (1/1) ... [2020-12-09 04:39:50,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:39:50,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:39:51,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:51,105 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:39:51,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:51,163 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:39:51,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51 WrapperNode [2020-12-09 04:39:51,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:51,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:51,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:39:51,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:39:51,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:51,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:39:51,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:39:51,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:39:51,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... [2020-12-09 04:39:51,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:39:51,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:39:51,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:39:51,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:39:51,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:39:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 04:39:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 04:39:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:39:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 04:39:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:39:51,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:39:51,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:39:51,537 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 04:39:51,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:51 BoogieIcfgContainer [2020-12-09 04:39:51,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:39:51,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:39:51,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:39:51,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:39:51,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:39:50" (1/3) ... [2020-12-09 04:39:51,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8c2e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:51, skipping insertion in model container [2020-12-09 04:39:51,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:51" (2/3) ... [2020-12-09 04:39:51,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8c2e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:51, skipping insertion in model container [2020-12-09 04:39:51,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:51" (3/3) ... [2020-12-09 04:39:51,544 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last-alloca-1.i [2020-12-09 04:39:51,554 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:39:51,556 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-09 04:39:51,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-09 04:39:51,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:39:51,577 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 04:39:51,577 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:39:51,577 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:39:51,577 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:39:51,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:39:51,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:39:51,578 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:39:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-09 04:39:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 04:39:51,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:51,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 04:39:51,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:51,596 INFO L82 PathProgramCache]: Analyzing trace with hash 98455, now seen corresponding path program 1 times [2020-12-09 04:39:51,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:51,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881882712] [2020-12-09 04:39:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:51,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881882712] [2020-12-09 04:39:51,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:51,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:39:51,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315779551] [2020-12-09 04:39:51,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:39:51,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:39:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:51,746 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-09 04:39:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:51,775 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-09 04:39:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:39:51,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 04:39:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:51,783 INFO L225 Difference]: With dead ends: 26 [2020-12-09 04:39:51,783 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 04:39:51,784 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 [2020-12-09 04:39:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 04:39:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 04:39:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:39:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-09 04:39:51,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 3 [2020-12-09 04:39:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:51,807 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-09 04:39:51,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:39:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-09 04:39:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 04:39:51,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:51,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 04:39:51,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:39:51,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 3052842, now seen corresponding path program 1 times [2020-12-09 04:39:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004598367] [2020-12-09 04:39:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004598367] [2020-12-09 04:39:51,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:51,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 04:39:51,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107069114] [2020-12-09 04:39:51,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:39:51,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:39:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:51,839 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-12-09 04:39:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:51,868 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-09 04:39:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:39:51,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 04:39:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:51,869 INFO L225 Difference]: With dead ends: 22 [2020-12-09 04:39:51,869 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 04:39:51,869 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 [2020-12-09 04:39:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 04:39:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 04:39:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 04:39:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 04:39:51,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2020-12-09 04:39:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:51,873 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 04:39:51,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:39:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 04:39:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 04:39:51,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:51,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 04:39:51,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 04:39:51,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash 3052843, now seen corresponding path program 1 times [2020-12-09 04:39:51,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:51,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920569669] [2020-12-09 04:39:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:51,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920569669] [2020-12-09 04:39:51,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:51,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:39:51,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140795402] [2020-12-09 04:39:51,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:39:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:39:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:39:51,948 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-12-09 04:39:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:52,028 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-09 04:39:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:39:52,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 04:39:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:52,030 INFO L225 Difference]: With dead ends: 44 [2020-12-09 04:39:52,030 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 04:39:52,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:39:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 04:39:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-12-09 04:39:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 04:39:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2020-12-09 04:39:52,034 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 4 [2020-12-09 04:39:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:52,034 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2020-12-09 04:39:52,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:39:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2020-12-09 04:39:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 04:39:52,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:52,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 04:39:52,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 04:39:52,035 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash 3054404, now seen corresponding path program 1 times [2020-12-09 04:39:52,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:52,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357801942] [2020-12-09 04:39:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357801942] [2020-12-09 04:39:52,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:39:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319548672] [2020-12-09 04:39:52,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:39:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:39:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:52,065 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 4 states. [2020-12-09 04:39:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:52,094 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-09 04:39:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:39:52,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 04:39:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:52,096 INFO L225 Difference]: With dead ends: 29 [2020-12-09 04:39:52,096 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 04:39:52,096 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 [2020-12-09 04:39:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 04:39:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 04:39:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 04:39:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-12-09 04:39:52,100 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 4 [2020-12-09 04:39:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:52,100 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-12-09 04:39:52,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:39:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-12-09 04:39:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 04:39:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:52,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 04:39:52,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 04:39:52,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 3054405, now seen corresponding path program 1 times [2020-12-09 04:39:52,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:52,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362013031] [2020-12-09 04:39:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362013031] [2020-12-09 04:39:52,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:52,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:39:52,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766126881] [2020-12-09 04:39:52,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:39:52,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:39:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:52,134 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 4 states. [2020-12-09 04:39:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:52,151 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 04:39:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:39:52,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 04:39:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:52,152 INFO L225 Difference]: With dead ends: 21 [2020-12-09 04:39:52,152 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 04:39:52,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 04:39:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 04:39:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 04:39:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 04:39:52,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 4 [2020-12-09 04:39:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:52,155 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 04:39:52,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:39:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 04:39:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:39:52,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:52,156 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-12-09 04:39:52,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 04:39:52,156 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1361145065, now seen corresponding path program 1 times [2020-12-09 04:39:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:52,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229614195] [2020-12-09 04:39:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229614195] [2020-12-09 04:39:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683834044] [2020-12-09 04:39:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:39:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:39:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:52,295 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 8 treesize of output 7 [2020-12-09 04:39:52,296 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:39:52,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:39:52,300 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:39:52,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-09 04:39:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:39:52,400 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 04:39:52,437 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:39:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:52,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307970815] [2020-12-09 04:39:52,473 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 04:39:52,473 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:39:52,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:39:52,481 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:39:52,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:39:52,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:39:52,769 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:39:53,085 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-09 04:39:53,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:39:53,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:39:53,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-12-09 04:39:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928760029] [2020-12-09 04:39:53,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:39:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:39:53,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:39:53,157 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 12 states. [2020-12-09 04:39:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:53,245 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 04:39:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 04:39:53,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2020-12-09 04:39:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:53,246 INFO L225 Difference]: With dead ends: 20 [2020-12-09 04:39:53,246 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 04:39:53,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-12-09 04:39:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 04:39:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-09 04:39:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 04:39:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-09 04:39:53,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 6 [2020-12-09 04:39:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:53,249 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-09 04:39:53,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:39:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-09 04:39:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:39:53,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:53,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:39:53,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 04:39:53,451 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1361143503, now seen corresponding path program 1 times [2020-12-09 04:39:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:53,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285789729] [2020-12-09 04:39:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:53,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285789729] [2020-12-09 04:39:53,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046917233] [2020-12-09 04:39:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:39:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:39:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:53,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:39:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:53,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358152498] [2020-12-09 04:39:53,781 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 04:39:53,781 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:39:53,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:39:53,781 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:39:53,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:39:53,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:39:53,957 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:39:54,253 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-09 04:39:54,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:39:54,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:39:54,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2020-12-09 04:39:54,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781106940] [2020-12-09 04:39:54,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 04:39:54,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 04:39:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:39:54,414 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-12-09 04:39:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:54,566 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 04:39:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 04:39:54,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-12-09 04:39:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:54,567 INFO L225 Difference]: With dead ends: 27 [2020-12-09 04:39:54,567 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 04:39:54,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-09 04:39:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 04:39:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-09 04:39:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 04:39:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 04:39:54,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2020-12-09 04:39:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:54,570 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 04:39:54,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 04:39:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 04:39:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:39:54,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:54,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:39:54,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:39:54,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2123520150, now seen corresponding path program 1 times [2020-12-09 04:39:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:54,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683901327] [2020-12-09 04:39:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:39:54,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683901327] [2020-12-09 04:39:54,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:54,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:39:54,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267431926] [2020-12-09 04:39:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:39:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:39:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:54,849 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-09 04:39:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:54,861 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-09 04:39:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:39:54,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 04:39:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:54,862 INFO L225 Difference]: With dead ends: 21 [2020-12-09 04:39:54,862 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 04:39:54,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 04:39:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 04:39:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 04:39:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-09 04:39:54,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2020-12-09 04:39:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:54,864 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-09 04:39:54,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:39:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-09 04:39:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:39:54,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:54,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:39:54,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-12-09 04:39:54,865 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 594848891, now seen corresponding path program 1 times [2020-12-09 04:39:54,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:54,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425560474] [2020-12-09 04:39:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425560474] [2020-12-09 04:39:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969422987] [2020-12-09 04:39:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:39:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 04:39:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:55,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:39:55,290 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 04:39:55,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325761759] [2020-12-09 04:39:55,292 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 04:39:55,292 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:39:55,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:39:55,293 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:39:55,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:39:55,307 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@fbfffc5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:39:55,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-09 04:39:55,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-09 04:39:55,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955087561] [2020-12-09 04:39:55,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:39:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:39:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:39:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-09 04:39:55,310 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-12-09 04:39:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:39:55,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-09 04:39:55,512 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@fbfffc5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:39:55,514 INFO L168 Benchmark]: Toolchain (without parser) took 4634.86 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 46.3 MB in the beginning and 38.8 MB in the end (delta: 7.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,514 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory was 63.6 MB in the beginning and 63.5 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:39:55,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.53 ms. Allocated memory is still 86.0 MB. Free memory was 46.0 MB in the beginning and 47.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.69 ms. Allocated memory is still 86.0 MB. Free memory was 47.8 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,515 INFO L168 Benchmark]: Boogie Preprocessor took 21.68 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 45.0 MB in the end (delta: 965.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,515 INFO L168 Benchmark]: RCFGBuilder took 320.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.7 MB in the beginning and 49.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,516 INFO L168 Benchmark]: TraceAbstraction took 3973.29 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 49.4 MB in the beginning and 38.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:55,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory was 63.6 MB in the beginning and 63.5 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.53 ms. Allocated memory is still 86.0 MB. Free memory was 46.0 MB in the beginning and 47.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.69 ms. Allocated memory is still 86.0 MB. Free memory was 47.8 MB in the beginning and 45.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.68 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 45.0 MB in the end (delta: 965.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 320.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.7 MB in the beginning and 49.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3973.29 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 49.4 MB in the beginning and 38.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@fbfffc5 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@fbfffc5: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:39:57,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:39:57,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:39:57,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:39:57,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:39:57,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:39:57,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:39:57,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:39:57,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:39:57,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:39:57,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:39:57,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:39:57,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:39:57,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:39:57,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:39:57,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:39:57,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:39:57,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:39:57,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:39:57,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:39:57,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:39:57,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:39:57,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:39:57,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:39:57,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:39:57,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:39:57,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:39:57,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:39:57,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:39:57,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:39:57,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:39:57,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:39:57,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:39:57,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:39:57,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:39:57,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:39:57,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:39:57,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:39:57,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:39:57,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:39:57,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:39:57,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 04:39:57,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:39:57,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:39:57,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:39:57,213 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:39:57,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:39:57,213 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:39:57,213 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:39:57,213 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:39:57,213 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:39:57,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 04:39:57,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 04:39:57,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:39:57,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 04:39:57,215 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:39:57,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:39:57,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:39:57,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:57,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:39:57,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:39:57,223 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:39:57,223 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:39:57,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:39:57,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:39:57,224 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-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e64c1324249ca9b9e3c019cfc2046542af7b26 [2020-12-09 04:39:57,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:39:57,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:39:57,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:39:57,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:39:57,488 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:39:57,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2020-12-09 04:39:57,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/8c0af75be/7412fb9fd0054c479e2c88dc3d581ce5/FLAGc4d1c5377 [2020-12-09 04:39:57,998 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:39:57,999 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2020-12-09 04:39:58,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/8c0af75be/7412fb9fd0054c479e2c88dc3d581ce5/FLAGc4d1c5377 [2020-12-09 04:39:58,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/data/8c0af75be/7412fb9fd0054c479e2c88dc3d581ce5 [2020-12-09 04:39:58,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:39:58,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:39:58,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:58,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:39:58,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:39:58,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e9d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58, skipping insertion in model container [2020-12-09 04:39:58,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:39:58,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:39:58,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:58,277 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:39:58,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:58,337 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:39:58,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58 WrapperNode [2020-12-09 04:39:58,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:58,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:58,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:39:58,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:39:58,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:58,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:39:58,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:39:58,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:39:58,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... [2020-12-09 04:39:58,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:39:58,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:39:58,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:39:58,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:39:58,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:39:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 04:39:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:39:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 04:39:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 04:39:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:39:58,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:39:58,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:39:58,732 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 04:39:58,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:58 BoogieIcfgContainer [2020-12-09 04:39:58,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:39:58,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:39:58,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:39:58,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:39:58,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:39:58" (1/3) ... [2020-12-09 04:39:58,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758155d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:58, skipping insertion in model container [2020-12-09 04:39:58,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:58" (2/3) ... [2020-12-09 04:39:58,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758155d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:58, skipping insertion in model container [2020-12-09 04:39:58,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:58" (3/3) ... [2020-12-09 04:39:58,738 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last-alloca-1.i [2020-12-09 04:39:58,751 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:39:58,753 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-09 04:39:58,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-09 04:39:58,775 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:39:58,775 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 04:39:58,775 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:39:58,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:39:58,775 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:39:58,775 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:39:58,776 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:39:58,776 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:39:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 04:39:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:39:58,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:58,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:39:58,790 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash 889508760, now seen corresponding path program 1 times [2020-12-09 04:39:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:39:58,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638163744] [2020-12-09 04:39:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:39:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:39:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:58,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:39:58,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638163744] [2020-12-09 04:39:58,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:58,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:39:58,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940579018] [2020-12-09 04:39:58,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:39:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:39:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:39:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:58,923 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-12-09 04:39:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:58,989 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 04:39:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:39:58,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 04:39:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:58,998 INFO L225 Difference]: With dead ends: 33 [2020-12-09 04:39:58,999 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 04:39:59,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 04:39:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 04:39:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:39:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-09 04:39:59,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2020-12-09 04:39:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:59,033 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-09 04:39:59,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:39:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-09 04:39:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:39:59,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:59,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:39:59,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:39:59,236 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968471, now seen corresponding path program 1 times [2020-12-09 04:39:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:39:59,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771546226] [2020-12-09 04:39:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:39:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:39:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:59,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:39:59,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771546226] [2020-12-09 04:39:59,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:59,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:39:59,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530508704] [2020-12-09 04:39:59,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:39:59,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:39:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:39:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:59,426 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-12-09 04:39:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:59,515 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-09 04:39:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:39:59,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 04:39:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:59,517 INFO L225 Difference]: With dead ends: 65 [2020-12-09 04:39:59,518 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 04:39:59,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:39:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 04:39:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2020-12-09 04:39:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 04:39:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-09 04:39:59,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 7 [2020-12-09 04:39:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:39:59,522 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-09 04:39:59,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:39:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-09 04:39:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:39:59,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:59,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:39:59,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:39:59,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:39:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2020-12-09 04:39:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:39:59,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136418797] [2020-12-09 04:39:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:39:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:39:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:39:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:39:59,918 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 [2020-12-09 04:39:59,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:39:59,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:39:59,922 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:39:59,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 04:39:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:39:59,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:39:59,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136418797] [2020-12-09 04:39:59,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:39:59,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:39:59,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406700467] [2020-12-09 04:39:59,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:39:59,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:39:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:39:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:59,931 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 3 states. [2020-12-09 04:39:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:39:59,998 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-09 04:39:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:39:59,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 04:39:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:39:59,998 INFO L225 Difference]: With dead ends: 31 [2020-12-09 04:39:59,999 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 04:39:59,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:39:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 04:40:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 04:40:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:40:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-09 04:40:00,002 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7 [2020-12-09 04:40:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:00,003 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-09 04:40:00,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:40:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-09 04:40:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:40:00,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:00,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:00,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:40:00,205 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2020-12-09 04:40:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:00,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541099400] [2020-12-09 04:40:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:40:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:40:00,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:00,340 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 [2020-12-09 04:40:00,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:00,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:00,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:00,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 04:40:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:00,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541099400] [2020-12-09 04:40:00,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:00,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:40:00,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653065768] [2020-12-09 04:40:00,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:00,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:00,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:00,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:00,375 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-12-09 04:40:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:00,528 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-09 04:40:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:00,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 04:40:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:00,530 INFO L225 Difference]: With dead ends: 55 [2020-12-09 04:40:00,530 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 04:40:00,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:40:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 04:40:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-09 04:40:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 04:40:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-12-09 04:40:00,534 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 7 [2020-12-09 04:40:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:00,534 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-12-09 04:40:00,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-12-09 04:40:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:40:00,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:00,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:00,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 04:40:00,737 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815513, now seen corresponding path program 1 times [2020-12-09 04:40:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618467081] [2020-12-09 04:40:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:40:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:40:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:00,852 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 [2020-12-09 04:40:00,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:00,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:00,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:00,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 04:40:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:00,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:00,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618467081] [2020-12-09 04:40:00,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:00,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:40:00,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905538335] [2020-12-09 04:40:00,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:40:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:40:00,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:40:00,865 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2020-12-09 04:40:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:00,954 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-12-09 04:40:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:40:00,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 04:40:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:00,955 INFO L225 Difference]: With dead ends: 40 [2020-12-09 04:40:00,955 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 04:40:00,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 04:40:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 04:40:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 04:40:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-09 04:40:00,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2020-12-09 04:40:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:00,958 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-09 04:40:00,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:40:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-09 04:40:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:40:00,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:00,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:01,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 04:40:01,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:01,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1806815514, now seen corresponding path program 1 times [2020-12-09 04:40:01,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643193889] [2020-12-09 04:40:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:40:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:40:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:01,226 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 8 treesize of output 7 [2020-12-09 04:40:01,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:01,236 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:01,237 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:01,237 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:01,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643193889] [2020-12-09 04:40:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:01,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:40:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245364529] [2020-12-09 04:40:01,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:01,285 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-12-09 04:40:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:01,397 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-12-09 04:40:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:01,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 04:40:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:01,398 INFO L225 Difference]: With dead ends: 44 [2020-12-09 04:40:01,398 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 04:40:01,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:40:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 04:40:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2020-12-09 04:40:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:40:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 04:40:01,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 7 [2020-12-09 04:40:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:01,401 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 04:40:01,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 04:40:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:40:01,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:01,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:01,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 04:40:01,603 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2013824101, now seen corresponding path program 1 times [2020-12-09 04:40:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:01,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286758660] [2020-12-09 04:40:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:40:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:40:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:01,699 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 [2020-12-09 04:40:01,700 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:01,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:01,705 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:01,705 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 04:40:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:40:01,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:01,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286758660] [2020-12-09 04:40:01,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:01,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:40:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461509420] [2020-12-09 04:40:01,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:01,736 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-12-09 04:40:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:01,872 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-12-09 04:40:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:01,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 04:40:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:01,873 INFO L225 Difference]: With dead ends: 57 [2020-12-09 04:40:01,873 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 04:40:01,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:40:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 04:40:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2020-12-09 04:40:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 04:40:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-12-09 04:40:01,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 11 [2020-12-09 04:40:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:01,878 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-12-09 04:40:01,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-12-09 04:40:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:40:01,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:01,879 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:02,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 04:40:02,080 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2013824051, now seen corresponding path program 1 times [2020-12-09 04:40:02,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:02,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066364094] [2020-12-09 04:40:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/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 [2020-12-09 04:40:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:40:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066364094] [2020-12-09 04:40:02,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [763734047] [2020-12-09 04:40:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:40:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:40:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431935362] [2020-12-09 04:40:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:40:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:02,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:40:02,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-12-09 04:40:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627849349] [2020-12-09 04:40:02,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:40:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:40:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:40:02,317 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-12-09 04:40:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:02,366 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-12-09 04:40:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:40:02,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 04:40:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:02,368 INFO L225 Difference]: With dead ends: 51 [2020-12-09 04:40:02,368 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 04:40:02,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:40:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 04:40:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-12-09 04:40:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 04:40:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-09 04:40:02,370 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2020-12-09 04:40:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:02,370 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-09 04:40:02,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:40:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-09 04:40:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:40:02,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:02,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:02,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:02,975 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1333765731, now seen corresponding path program 1 times [2020-12-09 04:40:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227019586] [2020-12-09 04:40:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:40:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:03,047 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 8 treesize of output 7 [2020-12-09 04:40:03,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:03,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:03,057 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. [2020-12-09 04:40:03,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:03,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227019586] [2020-12-09 04:40:03,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-09 04:40:03,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-12-09 04:40:03,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998130240] [2020-12-09 04:40:03,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:03,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:40:03,340 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 5 states. [2020-12-09 04:40:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:03,598 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-09 04:40:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:03,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 04:40:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:03,600 INFO L225 Difference]: With dead ends: 37 [2020-12-09 04:40:03,600 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 04:40:03,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-09 04:40:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 04:40:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-09 04:40:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:40:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-09 04:40:03,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 11 [2020-12-09 04:40:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:03,602 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-09 04:40:03,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-09 04:40:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:40:03,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:03,602 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:03,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 04:40:03,804 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1333765681, now seen corresponding path program 1 times [2020-12-09 04:40:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:03,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443462661] [2020-12-09 04:40:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:40:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:03,871 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 8 treesize of output 7 [2020-12-09 04:40:03,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:03,884 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:03,885 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:03,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443462661] [2020-12-09 04:40:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978101297] [2020-12-09 04:40:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:40:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:40:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:04,405 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 8 treesize of output 7 [2020-12-09 04:40:04,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:04,414 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:04,414 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:04,415 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:04,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:04,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777704858] [2020-12-09 04:40:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:04,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:40:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:04,489 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 8 treesize of output 7 [2020-12-09 04:40:04,490 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:04,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:04,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:04,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:04,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:04,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:40:04,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2020-12-09 04:40:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367080204] [2020-12-09 04:40:04,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:40:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:40:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:40:04,524 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-12-09 04:40:04,900 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-09 04:40:05,046 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-09 04:40:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:05,330 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-09 04:40:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 04:40:05,331 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-09 04:40:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:05,331 INFO L225 Difference]: With dead ends: 55 [2020-12-09 04:40:05,331 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 04:40:05,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-12-09 04:40:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 04:40:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-09 04:40:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 04:40:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-09 04:40:05,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2020-12-09 04:40:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:05,334 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-09 04:40:05,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:40:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-09 04:40:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 04:40:05,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:05,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:05,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt,13 mathsat -unsat_core_generation=3,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:05,937 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2109737472, now seen corresponding path program 1 times [2020-12-09 04:40:05,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:05,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635776481] [2020-12-09 04:40:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 04:40:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:05,993 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 [2020-12-09 04:40:05,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:05,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:05,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:05,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 04:40:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:40:06,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635776481] [2020-12-09 04:40:06,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:06,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:40:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856367788] [2020-12-09 04:40:06,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:06,040 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2020-12-09 04:40:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:06,091 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-09 04:40:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:06,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 04:40:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:06,093 INFO L225 Difference]: With dead ends: 42 [2020-12-09 04:40:06,093 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 04:40:06,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:40:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 04:40:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 04:40:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 04:40:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-09 04:40:06,097 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 15 [2020-12-09 04:40:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:06,097 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-09 04:40:06,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-09 04:40:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 04:40:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:06,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:06,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 04:40:06,300 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1407328063, now seen corresponding path program 1 times [2020-12-09 04:40:06,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:06,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597912846] [2020-12-09 04:40:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:40:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:06,490 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 15 treesize of output 7 [2020-12-09 04:40:06,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:06,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:06,493 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:06,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-09 04:40:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:40:06,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:06,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597912846] [2020-12-09 04:40:06,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 04:40:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746696367] [2020-12-09 04:40:06,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 04:40:06,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:06,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 04:40:06,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:40:06,502 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-12-09 04:40:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:06,611 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-09 04:40:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 04:40:06,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 04:40:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:06,612 INFO L225 Difference]: With dead ends: 43 [2020-12-09 04:40:06,612 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 04:40:06,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:40:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 04:40:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 04:40:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 04:40:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 04:40:06,614 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 18 [2020-12-09 04:40:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:06,614 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 04:40:06,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 04:40:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 04:40:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 04:40:06,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:06,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:06,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 04:40:06,816 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 04:40:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 386259709, now seen corresponding path program 1 times [2020-12-09 04:40:06,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:06,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519925176] [2020-12-09 04:40:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 04:40:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:07,007 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 8 treesize of output 7 [2020-12-09 04:40:07,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:07,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:07,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-12-09 04:40:07,110 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 20 [2020-12-09 04:40:07,112 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 04:40:07,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 04:40:07,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 04:40:07,129 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2020-12-09 04:40:07,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 04:40:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:40:07,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:07,490 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 20 [2020-12-09 04:40:07,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 04:40:07,522 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,522 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 20 [2020-12-09 04:40:07,524 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 04:40:07,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 04:40:07,567 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2020-12-09 04:40:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:40:07,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519925176] [2020-12-09 04:40:07,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881508240] [2020-12-09 04:40:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:40:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 04:40:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:07,979 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 15 treesize of output 11 [2020-12-09 04:40:07,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:07,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:07,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:07,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2020-12-09 04:40:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 04:40:08,137 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:08,137 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 10 [2020-12-09 04:40:08,138 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:40:08,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:40:08,146 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:40:08,146 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-12-09 04:40:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:08,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:40:08,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 04:40:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736201396] [2020-12-09 04:40:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b1d37d2-fad3-45f9-8e58-c181f4aecaa4/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:08,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 04:40:08,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:08,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f2489c [2020-12-09 04:40:08,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:40:08,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-09 04:40:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054514976] [2020-12-09 04:40:08,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 04:40:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 04:40:08,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-12-09 04:40:08,532 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 16 states. [2020-12-09 04:40:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:40:09,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,19 cvc4 --incremental --print-success --lang smt,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:40:09,136 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f2489c at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:40:09,144 INFO L168 Benchmark]: Toolchain (without parser) took 11118.99 ms. Allocated memory was 56.6 MB in the beginning and 92.3 MB in the end (delta: 35.7 MB). Free memory was 34.5 MB in the beginning and 38.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 32.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:40:09,144 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 39.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:40:09,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.11 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 28.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:40:09,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.47 ms. Allocated memory is still 56.6 MB. Free memory was 28.5 MB in the beginning and 26.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:40:09,145 INFO L168 Benchmark]: Boogie Preprocessor took 24.23 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 26.6 MB in the beginning and 58.4 MB in the end (delta: -31.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-12-09 04:40:09,145 INFO L168 Benchmark]: RCFGBuilder took 338.74 ms. Allocated memory is still 75.5 MB. Free memory was 58.4 MB in the beginning and 39.8 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 04:40:09,145 INFO L168 Benchmark]: TraceAbstraction took 10409.48 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 39.2 MB in the beginning and 38.6 MB in the end (delta: 616.2 kB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:40:09,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 39.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.11 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 28.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.47 ms. Allocated memory is still 56.6 MB. Free memory was 28.5 MB in the beginning and 26.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.23 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 26.6 MB in the beginning and 58.4 MB in the end (delta: -31.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 338.74 ms. Allocated memory is still 75.5 MB. Free memory was 58.4 MB in the beginning and 39.8 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10409.48 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 39.2 MB in the beginning and 38.6 MB in the end (delta: 616.2 kB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f2489c de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f2489c: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...