./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 f68b319d77fa756392ca29e618a1e0accd9b6c9e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 f68b319d77fa756392ca29e618a1e0accd9b6c9e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:52:59,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:52:59,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:52:59,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:52:59,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:52:59,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:52:59,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:52:59,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:52:59,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:52:59,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:52:59,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:52:59,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:52:59,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:52:59,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:52:59,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:52:59,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:52:59,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:52:59,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:52:59,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:52:59,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:52:59,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:52:59,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:52:59,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:52:59,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:52:59,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:52:59,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:52:59,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:53:00,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:53:00,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:53:00,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:53:00,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:53:00,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:53:00,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:53:00,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:53:00,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:53:00,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:53:00,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:53:00,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:53:00,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:53:00,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:53:00,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:53:00,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:53:00,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:53:00,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:53:00,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:53:00,060 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:53:00,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:53:00,060 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:53:00,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:53:00,061 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:53:00,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:53:00,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:53:00,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:53:00,062 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:53:00,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:53:00,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:53:00,063 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:53:00,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:53:00,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:53:00,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:53:00,065 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:53:00,065 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:53:00,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:53:00,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:53:00,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:53:00,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:53:00,066 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:53:00,066 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:53:00,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:53:00,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:53:00,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:53:00,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:53:00,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:53:00,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:53:00,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:53:00,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:53:00,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:53:00,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:53:00,069 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:53:00,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:53:00,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:53:00,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:53:00,071 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_1074453e-cda7-4112-97c3-f28fb9541f79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2020-11-30 01:53:00,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:53:00,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:53:00,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:53:00,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:53:00,451 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:53:00,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-11-30 01:53:00,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/77dc3e542/f3374e30a0f74d8b9c83768858db426d/FLAGcf602d14f [2020-11-30 01:53:01,164 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:53:01,165 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-11-30 01:53:01,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/77dc3e542/f3374e30a0f74d8b9c83768858db426d/FLAGcf602d14f [2020-11-30 01:53:01,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/77dc3e542/f3374e30a0f74d8b9c83768858db426d [2020-11-30 01:53:01,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:53:01,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:53:01,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:53:01,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:53:01,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:53:01,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:53:01" (1/1) ... [2020-11-30 01:53:01,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3582a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:01, skipping insertion in model container [2020-11-30 01:53:01,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:53:01" (1/1) ... [2020-11-30 01:53:01,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:53:01,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:53:01,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:53:01,970 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:53:02,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:53:02,131 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:53:02,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02 WrapperNode [2020-11-30 01:53:02,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:53:02,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:53:02,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:53:02,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:53:02,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:53:02,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:53:02,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:53:02,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:53:02,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... [2020-11-30 01:53:02,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:53:02,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:53:02,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:53:02,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:53:02,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:53:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:53:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:53:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:53:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:53:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:53:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:53:03,304 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:53:03,307 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:53:03,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:53:03 BoogieIcfgContainer [2020-11-30 01:53:03,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:53:03,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:53:03,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:53:03,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:53:03,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:53:01" (1/3) ... [2020-11-30 01:53:03,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6005cdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:53:03, skipping insertion in model container [2020-11-30 01:53:03,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:53:02" (2/3) ... [2020-11-30 01:53:03,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6005cdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:53:03, skipping insertion in model container [2020-11-30 01:53:03,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:53:03" (3/3) ... [2020-11-30 01:53:03,321 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2020-11-30 01:53:03,334 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:53:03,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 01:53:03,353 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 01:53:03,377 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:53:03,378 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:53:03,378 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:53:03,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:53:03,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:53:03,378 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:53:03,378 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:53:03,379 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:53:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-30 01:53:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:53:03,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:03,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:53:03,401 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 142005, now seen corresponding path program 1 times [2020-11-30 01:53:03,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:03,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911820909] [2020-11-30 01:53:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911820909] [2020-11-30 01:53:03,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:03,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:53:03,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339719544] [2020-11-30 01:53:03,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:53:03,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:53:03,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:53:03,636 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-11-30 01:53:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:03,742 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-30 01:53:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:53:03,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:53:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:03,758 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:53:03,758 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:53:03,763 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 [2020-11-30 01:53:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:53:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 01:53:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:53:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-11-30 01:53:03,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 3 [2020-11-30 01:53:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:03,822 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-11-30 01:53:03,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:53:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-11-30 01:53:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:53:03,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:03,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:53:03,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:53:03,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 142006, now seen corresponding path program 1 times [2020-11-30 01:53:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:03,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090927976] [2020-11-30 01:53:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:03,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090927976] [2020-11-30 01:53:03,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:03,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:53:03,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065486247] [2020-11-30 01:53:03,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:53:03,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:53:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:53:03,937 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2020-11-30 01:53:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:04,158 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-30 01:53:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:53:04,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 01:53:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:04,160 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:53:04,161 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 01:53:04,162 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 [2020-11-30 01:53:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 01:53:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2020-11-30 01:53:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:53:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-30 01:53:04,169 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 3 [2020-11-30 01:53:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:04,169 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-30 01:53:04,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:53:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-30 01:53:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:53:04,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:04,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:53:04,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:53:04,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash 4488543, now seen corresponding path program 1 times [2020-11-30 01:53:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457224324] [2020-11-30 01:53:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:04,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457224324] [2020-11-30 01:53:04,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:04,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:53:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184599127] [2020-11-30 01:53:04,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:53:04,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:53:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:53:04,325 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 3 states. [2020-11-30 01:53:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:04,382 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 01:53:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:53:04,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:53:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:04,384 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:53:04,384 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 01:53:04,384 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 [2020-11-30 01:53:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 01:53:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 01:53:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:53:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-30 01:53:04,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 4 [2020-11-30 01:53:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:04,390 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-30 01:53:04,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:53:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-30 01:53:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:53:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:04,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:53:04,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:53:04,391 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 4486301, now seen corresponding path program 1 times [2020-11-30 01:53:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567327065] [2020-11-30 01:53:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:04,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567327065] [2020-11-30 01:53:04,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:04,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:53:04,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957618122] [2020-11-30 01:53:04,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:53:04,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:53:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:53:04,439 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 3 states. [2020-11-30 01:53:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:04,491 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-30 01:53:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:53:04,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:53:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:04,492 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:53:04,492 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:53:04,493 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 [2020-11-30 01:53:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:53:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-30 01:53:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:53:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-30 01:53:04,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 4 [2020-11-30 01:53:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:04,497 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-30 01:53:04,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:53:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-30 01:53:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:53:04,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:04,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:53:04,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:53:04,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash 4486302, now seen corresponding path program 1 times [2020-11-30 01:53:04,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:04,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319598644] [2020-11-30 01:53:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319598644] [2020-11-30 01:53:04,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:04,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:53:04,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840998593] [2020-11-30 01:53:04,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:53:04,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:53:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:04,609 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-11-30 01:53:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:04,740 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-11-30 01:53:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:53:04,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-30 01:53:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:04,742 INFO L225 Difference]: With dead ends: 57 [2020-11-30 01:53:04,742 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:53:04,742 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 [2020-11-30 01:53:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:53:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-11-30 01:53:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:53:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:53:04,747 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 4 [2020-11-30 01:53:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:53:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:53:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:53:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:53:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:04,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 01:53:04,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:53:04,749 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 136543463, now seen corresponding path program 1 times [2020-11-30 01:53:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:04,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415723113] [2020-11-30 01:53:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:04,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415723113] [2020-11-30 01:53:04,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706424035] [2020-11-30 01:53:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:53:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:53:04,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:05,008 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_42|], 1=[|ULTIMATE.start_main_old_#valid|]} [2020-11-30 01:53:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:53:05,045 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:53:05,046 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:53:05,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:53:05,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:53:05,080 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:53:05,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:53:05,098 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:53:05,098 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-30 01:53:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:05,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:05,195 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 01:53:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560821349] [2020-11-30 01:53:05,283 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 01:53:05,292 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:05,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:05,308 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:05,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:06,299 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:06,533 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-30 01:53:07,106 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-11-30 01:53:07,321 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-11-30 01:53:07,324 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:07,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:07,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-11-30 01:53:07,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163563668] [2020-11-30 01:53:07,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:53:07,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:53:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:53:07,327 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-11-30 01:53:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:07,685 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-11-30 01:53:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:53:07,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-11-30 01:53:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:07,686 INFO L225 Difference]: With dead ends: 90 [2020-11-30 01:53:07,687 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:53:07,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:53:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:53:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 31. [2020-11-30 01:53:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:53:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-30 01:53:07,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-11-30 01:53:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:07,691 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-30 01:53:07,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:53:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-30 01:53:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:53:07,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:07,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:53:07,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:53:07,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash 139144827, now seen corresponding path program 1 times [2020-11-30 01:53:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:07,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568356848] [2020-11-30 01:53:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:07,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568356848] [2020-11-30 01:53:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:07,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:53:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576981938] [2020-11-30 01:53:07,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:53:07,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:53:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:53:07,985 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-11-30 01:53:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:08,030 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-30 01:53:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:53:08,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:53:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:08,032 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:53:08,032 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 01:53:08,032 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 [2020-11-30 01:53:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 01:53:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 01:53:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:53:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-30 01:53:08,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 5 [2020-11-30 01:53:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:08,036 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-30 01:53:08,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:53:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-30 01:53:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:53:08,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:08,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:53:08,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-30 01:53:08,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 18524017, now seen corresponding path program 1 times [2020-11-30 01:53:08,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:08,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474026968] [2020-11-30 01:53:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:08,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474026968] [2020-11-30 01:53:08,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:08,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:53:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361736421] [2020-11-30 01:53:08,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:53:08,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:53:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:08,120 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-11-30 01:53:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:08,214 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-30 01:53:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:53:08,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 01:53:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:08,217 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:53:08,217 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:53:08,217 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 [2020-11-30 01:53:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:53:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-11-30 01:53:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:53:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-11-30 01:53:08,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 6 [2020-11-30 01:53:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:08,221 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-11-30 01:53:08,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:53:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-11-30 01:53:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:53:08,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:08,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:53:08,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-30 01:53:08,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 18524016, now seen corresponding path program 1 times [2020-11-30 01:53:08,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:08,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571758890] [2020-11-30 01:53:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:08,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571758890] [2020-11-30 01:53:08,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:08,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:53:08,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70663760] [2020-11-30 01:53:08,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:53:08,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:53:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:53:08,293 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2020-11-30 01:53:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:08,355 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-11-30 01:53:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:53:08,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 01:53:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:08,357 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:53:08,357 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:53:08,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:53:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-30 01:53:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:53:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-30 01:53:08,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 6 [2020-11-30 01:53:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:08,361 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-30 01:53:08,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:53:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-30 01:53:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:53:08,361 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:08,361 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-30 01:53:08,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-30 01:53:08,362 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 16430784, now seen corresponding path program 1 times [2020-11-30 01:53:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:08,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282306511] [2020-11-30 01:53:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282306511] [2020-11-30 01:53:08,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667547260] [2020-11-30 01:53:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:53:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:53:08,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:08,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:08,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046744540] [2020-11-30 01:53:08,726 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-30 01:53:08,726 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:08,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:08,727 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:08,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:09,400 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:09,642 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-30 01:53:09,877 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-30 01:53:10,591 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-11-30 01:53:10,729 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-11-30 01:53:10,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:10,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:10,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-11-30 01:53:10,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148725768] [2020-11-30 01:53:10,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:53:10,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:53:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:53:10,732 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-11-30 01:53:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:11,079 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-11-30 01:53:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:53:11,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-11-30 01:53:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:11,080 INFO L225 Difference]: With dead ends: 80 [2020-11-30 01:53:11,080 INFO L226 Difference]: Without dead ends: 80 [2020-11-30 01:53:11,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:53:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-30 01:53:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2020-11-30 01:53:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:53:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-11-30 01:53:11,085 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 6 [2020-11-30 01:53:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:11,085 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-11-30 01:53:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:53:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-11-30 01:53:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:53:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:11,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:11,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:11,286 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash 574245710, now seen corresponding path program 1 times [2020-11-30 01:53:11,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:11,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224066582] [2020-11-30 01:53:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224066582] [2020-11-30 01:53:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:53:11,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254482370] [2020-11-30 01:53:11,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:53:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:53:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:53:11,344 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-11-30 01:53:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:11,392 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 01:53:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:53:11,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 01:53:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:11,393 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:53:11,393 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:53:11,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:53:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:53:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:53:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-30 01:53:11,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2020-11-30 01:53:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:11,397 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-30 01:53:11,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:53:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-30 01:53:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:53:11,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:11,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:11,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-30 01:53:11,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 574245711, now seen corresponding path program 1 times [2020-11-30 01:53:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902651977] [2020-11-30 01:53:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902651977] [2020-11-30 01:53:11,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:11,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:53:11,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789920569] [2020-11-30 01:53:11,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:53:11,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:53:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:11,470 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-11-30 01:53:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:11,593 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 01:53:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:53:11,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 01:53:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:11,595 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:53:11,595 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:53:11,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:53:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:53:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:53:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:53:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:53:11,598 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2020-11-30 01:53:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:11,598 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:53:11,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:53:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:53:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:53:11,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:11,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:11,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-30 01:53:11,599 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2094314799, now seen corresponding path program 1 times [2020-11-30 01:53:11,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:11,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362288731] [2020-11-30 01:53:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:11,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362288731] [2020-11-30 01:53:11,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:11,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:53:11,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518438071] [2020-11-30 01:53:11,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:53:11,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:11,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:53:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:11,652 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-11-30 01:53:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:11,729 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-11-30 01:53:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:53:11,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-30 01:53:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:11,731 INFO L225 Difference]: With dead ends: 27 [2020-11-30 01:53:11,731 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:53:11,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:53:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:53:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:53:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:53:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 01:53:11,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2020-11-30 01:53:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:11,734 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 01:53:11,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:53:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 01:53:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:53:11,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:11,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:11,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-30 01:53:11,735 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2094314800, now seen corresponding path program 1 times [2020-11-30 01:53:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:11,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71835537] [2020-11-30 01:53:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:11,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71835537] [2020-11-30 01:53:11,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:11,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:53:11,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631909416] [2020-11-30 01:53:11,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:53:11,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:11,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:53:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:53:11,824 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-11-30 01:53:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:11,944 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-11-30 01:53:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:53:11,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:53:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:11,945 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:53:11,945 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 01:53:11,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:53:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 01:53:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-11-30 01:53:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:53:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:53:11,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2020-11-30 01:53:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:11,948 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:53:11,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:53:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:53:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:53:11,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:11,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:11,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-30 01:53:11,949 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 499248334, now seen corresponding path program 1 times [2020-11-30 01:53:11,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:11,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781159681] [2020-11-30 01:53:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781159681] [2020-11-30 01:53:12,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:12,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:53:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572140505] [2020-11-30 01:53:12,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:53:12,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:53:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:53:12,017 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-11-30 01:53:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:12,092 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-11-30 01:53:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:53:12,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:53:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:12,093 INFO L225 Difference]: With dead ends: 27 [2020-11-30 01:53:12,093 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:53:12,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:53:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:53:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:53:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:53:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 01:53:12,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2020-11-30 01:53:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:12,096 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 01:53:12,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:53:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 01:53:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:53:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:12,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:12,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-30 01:53:12,097 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash 499248335, now seen corresponding path program 1 times [2020-11-30 01:53:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:12,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865450755] [2020-11-30 01:53:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:12,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865450755] [2020-11-30 01:53:12,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:12,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:53:12,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92507804] [2020-11-30 01:53:12,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:53:12,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:12,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:53:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:53:12,193 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-11-30 01:53:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:12,348 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 01:53:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:53:12,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:53:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:12,349 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:53:12,349 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 01:53:12,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:53:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 01:53:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-11-30 01:53:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:53:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:53:12,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2020-11-30 01:53:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:12,353 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:53:12,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:53:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:53:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:53:12,353 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:12,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:12,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-30 01:53:12,354 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1703138371, now seen corresponding path program 1 times [2020-11-30 01:53:12,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:12,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667080549] [2020-11-30 01:53:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:12,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667080549] [2020-11-30 01:53:12,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:12,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 01:53:12,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863152205] [2020-11-30 01:53:12,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:53:12,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:53:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:53:12,490 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-11-30 01:53:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:12,805 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-11-30 01:53:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:53:12,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 01:53:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:12,807 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:53:12,807 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 01:53:12,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:53:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 01:53:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-11-30 01:53:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 01:53:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-30 01:53:12,814 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 11 [2020-11-30 01:53:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:12,814 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-30 01:53:12,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:53:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-30 01:53:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:53:12,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:12,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:12,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-30 01:53:12,816 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1258669792, now seen corresponding path program 1 times [2020-11-30 01:53:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:12,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844863811] [2020-11-30 01:53:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:13,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844863811] [2020-11-30 01:53:13,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:13,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 01:53:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274625213] [2020-11-30 01:53:13,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:53:13,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:53:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:53:13,167 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 9 states. [2020-11-30 01:53:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:13,846 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-11-30 01:53:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:53:13,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-30 01:53:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:13,847 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:53:13,847 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 01:53:13,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:53:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 01:53:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-11-30 01:53:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 01:53:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-11-30 01:53:13,850 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 12 [2020-11-30 01:53:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:13,851 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-11-30 01:53:13,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:53:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-11-30 01:53:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:53:13,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:13,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:13,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-30 01:53:13,852 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1257682845, now seen corresponding path program 1 times [2020-11-30 01:53:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:13,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523304000] [2020-11-30 01:53:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523304000] [2020-11-30 01:53:13,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:53:13,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:53:13,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137390913] [2020-11-30 01:53:13,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:53:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:53:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:53:13,974 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 4 states. [2020-11-30 01:53:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:14,014 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-11-30 01:53:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:53:14,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-30 01:53:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:14,015 INFO L225 Difference]: With dead ends: 43 [2020-11-30 01:53:14,015 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:53:14,015 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 [2020-11-30 01:53:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:53:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:53:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:53:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 01:53:14,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2020-11-30 01:53:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:14,018 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 01:53:14,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:53:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 01:53:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:53:14,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:14,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:14,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-30 01:53:14,019 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1044692206, now seen corresponding path program 1 times [2020-11-30 01:53:14,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:14,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919488116] [2020-11-30 01:53:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:14,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919488116] [2020-11-30 01:53:14,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704085818] [2020-11-30 01:53:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:53:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:53:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:14,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:14,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587326741] [2020-11-30 01:53:14,474 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 01:53:14,474 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:14,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:14,475 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:14,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:14,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:14,979 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:15,142 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 01:53:15,274 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-11-30 01:53:15,406 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-11-30 01:53:15,558 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 01:53:15,753 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-11-30 01:53:16,057 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-11-30 01:53:16,415 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-11-30 01:53:16,854 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-11-30 01:53:17,307 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-11-30 01:53:17,722 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2020-11-30 01:53:17,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:17,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 6, 6] total 24 [2020-11-30 01:53:17,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537869091] [2020-11-30 01:53:17,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:53:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:53:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:53:17,726 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2020-11-30 01:53:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:17,827 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-30 01:53:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:53:17,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-11-30 01:53:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:17,828 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:53:17,828 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 01:53:17,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:53:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 01:53:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-30 01:53:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:53:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:53:17,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2020-11-30 01:53:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:17,831 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:53:17,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:53:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:53:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:53:17,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:17,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:18,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-30 01:53:18,034 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash 778610764, now seen corresponding path program 1 times [2020-11-30 01:53:18,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:18,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20641348] [2020-11-30 01:53:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:18,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20641348] [2020-11-30 01:53:18,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177022999] [2020-11-30 01:53:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:53:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:18,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089134178] [2020-11-30 01:53:18,506 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:53:18,506 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:18,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:18,506 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:18,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:19,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:19,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:19,956 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-11-30 01:53:20,323 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:20,531 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 01:53:20,721 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:53:21,300 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 01:53:21,442 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-11-30 01:53:21,861 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-11-30 01:53:22,355 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-11-30 01:53:22,690 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:53:22,942 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-11-30 01:53:22,943 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:22,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2020-11-30 01:53:22,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70933993] [2020-11-30 01:53:22,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:53:22,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:53:22,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:53:22,945 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 16 states. [2020-11-30 01:53:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:23,275 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-30 01:53:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:53:23,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2020-11-30 01:53:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:23,277 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:53:23,277 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:53:23,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 01:53:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:53:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-11-30 01:53:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 01:53:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 01:53:23,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-11-30 01:53:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:23,280 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 01:53:23,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:53:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 01:53:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:53:23,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:23,281 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:23,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:23,494 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1632868908, now seen corresponding path program 1 times [2020-11-30 01:53:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:23,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073212012] [2020-11-30 01:53:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:23,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073212012] [2020-11-30 01:53:23,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622101623] [2020-11-30 01:53:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:53:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:23,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831273700] [2020-11-30 01:53:23,928 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:53:23,928 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:23,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:23,929 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:23,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:24,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:24,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:25,307 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-11-30 01:53:25,547 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:25,734 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 01:53:25,901 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:53:26,410 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 01:53:26,585 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-11-30 01:53:27,154 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-11-30 01:53:27,807 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-11-30 01:53:28,153 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:53:28,551 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-11-30 01:53:28,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:28,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2020-11-30 01:53:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485732491] [2020-11-30 01:53:28,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:53:28,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:53:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:53:28,554 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-11-30 01:53:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:29,015 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-30 01:53:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:53:29,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-11-30 01:53:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:29,019 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:53:29,019 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:53:29,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 01:53:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:53:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 01:53:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:53:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-30 01:53:29,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-11-30 01:53:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:29,021 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-30 01:53:29,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:53:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-30 01:53:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:53:29,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:29,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:29,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-11-30 01:53:29,222 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1523957131, now seen corresponding path program 1 times [2020-11-30 01:53:29,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:29,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394054175] [2020-11-30 01:53:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:29,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394054175] [2020-11-30 01:53:29,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131977638] [2020-11-30 01:53:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:53:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:29,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64634851] [2020-11-30 01:53:29,861 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:53:29,861 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:29,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:29,861 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:29,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:30,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:30,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:31,234 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-11-30 01:53:31,448 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:31,757 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-11-30 01:53:31,899 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 01:53:32,040 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:53:32,448 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 01:53:32,705 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-11-30 01:53:33,134 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-11-30 01:53:33,717 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-11-30 01:53:34,063 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:53:34,330 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-11-30 01:53:34,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:34,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:34,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2020-11-30 01:53:34,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305155962] [2020-11-30 01:53:34,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:53:34,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:53:34,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:53:34,332 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 18 states. [2020-11-30 01:53:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:34,772 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-30 01:53:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:53:34,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2020-11-30 01:53:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:34,773 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:53:34,773 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:53:34,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:53:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:53:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-11-30 01:53:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 01:53:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 01:53:34,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-11-30 01:53:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:34,776 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 01:53:34,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:53:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 01:53:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:53:34,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:34,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:34,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:34,977 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1968170, now seen corresponding path program 1 times [2020-11-30 01:53:34,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:34,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269833575] [2020-11-30 01:53:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269833575] [2020-11-30 01:53:35,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707946792] [2020-11-30 01:53:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 01:53:35,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:35,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872035123] [2020-11-30 01:53:35,442 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 01:53:35,442 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:35,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:35,443 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:35,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:35,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:36,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:36,745 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:36,933 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 01:53:37,076 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:53:37,522 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 01:53:37,684 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-11-30 01:53:38,234 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-11-30 01:53:38,880 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-11-30 01:53:39,228 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:53:39,516 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-11-30 01:53:39,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:39,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 8, 8] total 29 [2020-11-30 01:53:39,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016626136] [2020-11-30 01:53:39,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:53:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:53:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:53:39,639 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2020-11-30 01:53:39,889 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-11-30 01:53:40,176 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-11-30 01:53:40,439 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-30 01:53:40,985 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-11-30 01:53:41,616 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 104 [2020-11-30 01:53:41,890 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-30 01:53:42,169 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-30 01:53:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:42,187 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-30 01:53:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:53:42,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-11-30 01:53:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:42,188 INFO L225 Difference]: With dead ends: 25 [2020-11-30 01:53:42,188 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:53:42,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 01:53:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:53:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 01:53:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:53:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-30 01:53:42,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-11-30 01:53:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:42,191 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-30 01:53:42,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:53:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-30 01:53:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:53:42,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:42,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:42,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:42,393 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash 61045698, now seen corresponding path program 2 times [2020-11-30 01:53:42,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:42,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118111321] [2020-11-30 01:53:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118111321] [2020-11-30 01:53:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848011029] [2020-11-30 01:53:42,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:53:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:53:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 69 conjunts are in the unsatisfiable core [2020-11-30 01:53:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:43,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:53:45,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872005916] [2020-11-30 01:53:45,065 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:53:45,065 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:45,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:45,065 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:45,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:45,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:45,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:53:46,482 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-11-30 01:53:46,732 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:53:47,178 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:53:47,683 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 01:53:47,888 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-11-30 01:53:48,419 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-11-30 01:53:49,088 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-11-30 01:53:49,550 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:53:49,900 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-11-30 01:53:49,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:53:49,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:53:49,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 38 [2020-11-30 01:53:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716576977] [2020-11-30 01:53:49,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-30 01:53:49,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-30 01:53:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 01:53:49,903 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 39 states. [2020-11-30 01:53:51,322 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-11-30 01:53:51,714 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-11-30 01:53:52,167 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-11-30 01:53:52,358 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-11-30 01:53:52,569 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-11-30 01:53:53,021 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-11-30 01:53:53,360 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-11-30 01:53:53,727 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-11-30 01:53:53,950 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-11-30 01:53:54,232 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-11-30 01:53:54,419 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-11-30 01:53:54,651 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-11-30 01:53:54,899 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-30 01:53:55,113 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-11-30 01:53:55,457 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-11-30 01:53:55,895 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-11-30 01:53:56,249 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-11-30 01:53:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:53:57,003 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-11-30 01:53:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-30 01:53:57,003 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2020-11-30 01:53:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:53:57,004 INFO L225 Difference]: With dead ends: 89 [2020-11-30 01:53:57,004 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:53:57,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1396, Invalid=7724, Unknown=0, NotChecked=0, Total=9120 [2020-11-30 01:53:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:53:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-11-30 01:53:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:53:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-30 01:53:57,009 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 20 [2020-11-30 01:53:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:53:57,009 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-30 01:53:57,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-30 01:53:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-30 01:53:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:53:57,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:53:57,010 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:53:57,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2020-11-30 01:53:57,225 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:53:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:53:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 60393743, now seen corresponding path program 2 times [2020-11-30 01:53:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:53:57,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583667339] [2020-11-30 01:53:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:53:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:53:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:53:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583667339] [2020-11-30 01:53:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038251007] [2020-11-30 01:53:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:57,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:53:57,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:53:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 60 conjunts are in the unsatisfiable core [2020-11-30 01:53:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:53:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:53:58,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:53:58,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 01:53:58,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525969924] [2020-11-30 01:53:58,573 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:53:58,573 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:53:58,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:53:58,573 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:53:58,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:53:58,584 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7c4be91b 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:566) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:439) 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 01:53:58,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:53:58,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-30 01:53:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740651947] [2020-11-30 01:53:58,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:53:58,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:53:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:53:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:53:58,588 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-11-30 01:53:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:53:58,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:53:58,790 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@7c4be91b 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 01:53:58,792 INFO L168 Benchmark]: Toolchain (without parser) took 57344.54 ms. Allocated memory was 86.0 MB in the beginning and 318.8 MB in the end (delta: 232.8 MB). Free memory was 49.2 MB in the beginning and 226.2 MB in the end (delta: -177.0 MB). Peak memory consumption was 55.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,793 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory is still 66.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:53:58,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.74 ms. Allocated memory is still 86.0 MB. Free memory was 49.0 MB in the beginning and 51.9 MB in the end (delta: -2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.32 ms. Allocated memory is still 86.0 MB. Free memory was 51.9 MB in the beginning and 49.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,793 INFO L168 Benchmark]: Boogie Preprocessor took 36.00 ms. Allocated memory is still 86.0 MB. Free memory was 49.9 MB in the beginning and 48.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,794 INFO L168 Benchmark]: RCFGBuilder took 1038.74 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.5 MB in the beginning and 65.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,794 INFO L168 Benchmark]: TraceAbstraction took 55479.87 ms. Allocated memory was 104.9 MB in the beginning and 318.8 MB in the end (delta: 213.9 MB). Free memory was 65.0 MB in the beginning and 226.2 MB in the end (delta: -161.2 MB). Peak memory consumption was 51.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:53:58,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory is still 66.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 683.74 ms. Allocated memory is still 86.0 MB. Free memory was 49.0 MB in the beginning and 51.9 MB in the end (delta: -2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.32 ms. Allocated memory is still 86.0 MB. Free memory was 51.9 MB in the beginning and 49.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.00 ms. Allocated memory is still 86.0 MB. Free memory was 49.9 MB in the beginning and 48.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1038.74 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.5 MB in the beginning and 65.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 55479.87 ms. Allocated memory was 104.9 MB in the beginning and 318.8 MB in the end (delta: 213.9 MB). Free memory was 65.0 MB in the beginning and 226.2 MB in the end (delta: -161.2 MB). Peak memory consumption was 51.5 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@7c4be91b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7c4be91b: 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-a4ecdab [2020-11-30 01:54:01,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:54:01,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:54:01,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:54:01,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:54:01,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:54:01,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:54:01,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:54:01,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:54:01,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:54:01,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:54:01,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:54:01,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:54:01,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:54:01,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:54:01,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:54:01,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:54:01,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:54:01,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:54:01,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:54:01,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:54:01,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:54:01,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:54:01,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:54:01,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:54:01,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:54:01,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:54:01,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:54:01,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:54:01,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:54:01,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:54:01,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:54:01,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:54:01,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:54:01,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:54:01,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:54:01,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:54:01,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:54:01,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:54:01,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:54:01,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:54:01,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-30 01:54:01,730 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:54:01,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:54:01,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:54:01,732 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:54:01,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:54:01,733 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:54:01,733 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:54:01,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:54:01,733 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:54:01,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:54:01,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:54:01,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:54:01,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:54:01,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:54:01,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:54:01,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:54:01,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:54:01,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:54:01,737 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:54:01,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:54:01,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:54:01,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:54:01,738 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:54:01,738 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:54:01,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:54:01,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:54:01,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:54:01,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:54:01,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:54:01,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:54:01,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:54:01,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:54:01,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:54:01,741 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 01:54:01,741 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:54:01,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:54:01,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:54:01,742 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_1074453e-cda7-4112-97c3-f28fb9541f79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2020-11-30 01:54:02,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:54:02,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:54:02,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:54:02,191 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:54:02,192 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:54:02,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-11-30 01:54:02,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/37db12ff1/f7d877cda1f04c91bdc8c0ed116c6f34/FLAG070984acf [2020-11-30 01:54:03,054 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:54:03,055 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-11-30 01:54:03,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/37db12ff1/f7d877cda1f04c91bdc8c0ed116c6f34/FLAG070984acf [2020-11-30 01:54:03,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/data/37db12ff1/f7d877cda1f04c91bdc8c0ed116c6f34 [2020-11-30 01:54:03,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:54:03,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:54:03,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:54:03,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:54:03,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:54:03,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:03,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cceca86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03, skipping insertion in model container [2020-11-30 01:54:03,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:03,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:54:03,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:54:03,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:54:03,830 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:54:03,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:54:03,978 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:54:03,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03 WrapperNode [2020-11-30 01:54:03,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:54:03,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:54:03,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:54:03,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:54:03,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:54:04,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:54:04,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:54:04,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:54:04,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... [2020-11-30 01:54:04,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:54:04,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:54:04,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:54:04,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:54:04,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-11-30 01:54:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:54:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-11-30 01:54:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:54:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:54:04,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:54:05,138 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:54:05,139 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:54:05,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:05 BoogieIcfgContainer [2020-11-30 01:54:05,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:54:05,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:54:05,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:54:05,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:54:05,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:54:03" (1/3) ... [2020-11-30 01:54:05,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0dea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:54:05, skipping insertion in model container [2020-11-30 01:54:05,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:03" (2/3) ... [2020-11-30 01:54:05,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0dea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:54:05, skipping insertion in model container [2020-11-30 01:54:05,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:05" (3/3) ... [2020-11-30 01:54:05,154 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2020-11-30 01:54:05,167 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:54:05,173 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 01:54:05,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 01:54:05,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:54:05,228 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:54:05,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:54:05,229 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:54:05,229 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:54:05,229 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:54:05,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:54:05,230 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:54:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-11-30 01:54:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:54:05,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:05,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:05,265 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-11-30 01:54:05,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:05,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436694777] [2020-11-30 01:54:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:54:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:05,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:05,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436694777] [2020-11-30 01:54:05,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:05,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:54:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788259812] [2020-11-30 01:54:05,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:54:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:54:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:05,534 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 6 states. [2020-11-30 01:54:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:05,697 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-11-30 01:54:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:05,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 01:54:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:05,711 INFO L225 Difference]: With dead ends: 92 [2020-11-30 01:54:05,711 INFO L226 Difference]: Without dead ends: 88 [2020-11-30 01:54:05,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-30 01:54:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2020-11-30 01:54:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 01:54:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-11-30 01:54:05,758 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2020-11-30 01:54:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:05,759 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-11-30 01:54:05,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:54:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-11-30 01:54:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:54:05,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:05,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:05,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:54:05,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-11-30 01:54:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:05,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422861762] [2020-11-30 01:54:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:54:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:06,129 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 01:54:06,130 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:06,131 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:06,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:06,152 INFO L545 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. [2020-11-30 01:54:06,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 01:54:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:06,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422861762] [2020-11-30 01:54:06,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:06,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:54:06,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938983532] [2020-11-30 01:54:06,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:54:06,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:06,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:54:06,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:06,210 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 3 states. [2020-11-30 01:54:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:06,559 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-11-30 01:54:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:54:06,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:54:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:06,562 INFO L225 Difference]: With dead ends: 49 [2020-11-30 01:54:06,562 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:54:06,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:54:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-30 01:54:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:54:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-11-30 01:54:06,577 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2020-11-30 01:54:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:06,578 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-11-30 01:54:06,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:54:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-11-30 01:54:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:54:06,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:06,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:06,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:54:06,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-11-30 01:54:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:06,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096720400] [2020-11-30 01:54:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:54:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:06,948 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-11-30 01:54:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:06,982 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:06,982 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,022 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:07,040 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:07,042 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:07,085 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,085 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2020-11-30 01:54:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:07,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:07,282 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-11-30 01:54:07,316 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 01:54:07,328 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:07,330 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,344 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 01:54:07,349 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:07,364 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:07,365 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2020-11-30 01:54:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:07,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096720400] [2020-11-30 01:54:07,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:07,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:54:07,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593323741] [2020-11-30 01:54:07,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:54:07,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:54:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:07,399 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 6 states. [2020-11-30 01:54:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:08,301 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-11-30 01:54:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:08,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 01:54:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:08,306 INFO L225 Difference]: With dead ends: 89 [2020-11-30 01:54:08,306 INFO L226 Difference]: Without dead ends: 89 [2020-11-30 01:54:08,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:54:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-30 01:54:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2020-11-30 01:54:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 01:54:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-11-30 01:54:08,319 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2020-11-30 01:54:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:08,320 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-11-30 01:54:08,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:54:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-11-30 01:54:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:54:08,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:08,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:08,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 01:54:08,541 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-11-30 01:54:08,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:08,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239612447] [2020-11-30 01:54:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:54:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:08,644 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_35|]} [2020-11-30 01:54:08,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:08,658 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:08,659 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:08,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:08,699 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:08,703 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:08,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:08,731 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:08,732 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-30 01:54:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:08,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:08,859 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:54:08,900 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 01:54:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:08,909 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:08,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:08,913 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 01:54:08,914 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:08,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:5 [2020-11-30 01:54:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239612447] [2020-11-30 01:54:08,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:08,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:54:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539451848] [2020-11-30 01:54:08,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:54:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:08,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:54:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:08,940 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-11-30 01:54:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:09,531 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-11-30 01:54:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:54:09,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:54:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:09,535 INFO L225 Difference]: With dead ends: 85 [2020-11-30 01:54:09,535 INFO L226 Difference]: Without dead ends: 85 [2020-11-30 01:54:09,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:54:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-30 01:54:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2020-11-30 01:54:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-30 01:54:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-11-30 01:54:09,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2020-11-30 01:54:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:09,544 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-11-30 01:54:09,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:54:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-11-30 01:54:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:54:09,545 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:09,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:09,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 01:54:09,755 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-11-30 01:54:09,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:09,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576425146] [2020-11-30 01:54:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:54:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:09,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576425146] [2020-11-30 01:54:09,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:09,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:54:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329236264] [2020-11-30 01:54:09,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:54:09,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:09,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:54:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:09,891 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2020-11-30 01:54:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:10,005 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-11-30 01:54:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:10,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:54:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:10,014 INFO L225 Difference]: With dead ends: 90 [2020-11-30 01:54:10,014 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:54:10,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:54:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2020-11-30 01:54:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:54:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-11-30 01:54:10,022 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 9 [2020-11-30 01:54:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:10,023 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-11-30 01:54:10,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:54:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-11-30 01:54:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:54:10,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:10,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:10,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 01:54:10,251 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-11-30 01:54:10,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:10,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954760452] [2020-11-30 01:54:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:54:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:10,333 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 01:54:10,333 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:10,334 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:10,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:10,342 INFO L545 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. [2020-11-30 01:54:10,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 01:54:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:10,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954760452] [2020-11-30 01:54:10,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:10,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:54:10,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571756271] [2020-11-30 01:54:10,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:54:10,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:54:10,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:10,380 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 3 states. [2020-11-30 01:54:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:10,496 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-11-30 01:54:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:54:10,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 01:54:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:10,497 INFO L225 Difference]: With dead ends: 59 [2020-11-30 01:54:10,497 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:54:10,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:54:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-30 01:54:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 01:54:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-11-30 01:54:10,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 9 [2020-11-30 01:54:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:10,505 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-11-30 01:54:10,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:54:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-11-30 01:54:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:54:10,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:10,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:10,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-30 01:54:10,724 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-11-30 01:54:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:10,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408640009] [2020-11-30 01:54:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:54:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:10,873 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:10,873 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:10,874 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:10,935 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 01:54:10,938 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:10,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-11-30 01:54:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408640009] [2020-11-30 01:54:11,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:11,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 01:54:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467406344] [2020-11-30 01:54:11,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:54:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:54:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:54:11,219 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 8 states. [2020-11-30 01:54:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:11,875 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-11-30 01:54:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:54:11,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-11-30 01:54:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:11,877 INFO L225 Difference]: With dead ends: 90 [2020-11-30 01:54:11,877 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:54:11,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:54:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:54:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2020-11-30 01:54:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:54:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-11-30 01:54:11,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 9 [2020-11-30 01:54:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:11,884 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-11-30 01:54:11,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:54:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-11-30 01:54:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:54:11,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:11,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:12,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 01:54:12,103 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-11-30 01:54:12,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:12,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731064324] [2020-11-30 01:54:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:54:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:12,211 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:12,212 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:12,212 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:12,263 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-30 01:54:12,266 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:12,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-11-30 01:54:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:12,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:12,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731064324] [2020-11-30 01:54:12,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:12,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:54:12,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119175837] [2020-11-30 01:54:12,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:54:12,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:54:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:54:12,470 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 6 states. [2020-11-30 01:54:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:12,886 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-11-30 01:54:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:54:12,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:54:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:12,889 INFO L225 Difference]: With dead ends: 87 [2020-11-30 01:54:12,889 INFO L226 Difference]: Without dead ends: 87 [2020-11-30 01:54:12,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:54:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-30 01:54:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-11-30 01:54:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 01:54:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-11-30 01:54:12,894 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 10 [2020-11-30 01:54:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:12,895 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-11-30 01:54:12,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:54:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-11-30 01:54:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:54:12,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:12,896 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:13,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-30 01:54:13,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-11-30 01:54:13,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:13,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347949364] [2020-11-30 01:54:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:54:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:13,196 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_42|]} [2020-11-30 01:54:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:13,206 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:13,206 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:13,233 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:13,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:13,247 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:13,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:13,289 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:13,289 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 01:54:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:13,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:14,135 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 01:54:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:14,140 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:14,141 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:14,142 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 01:54:14,142 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:14,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:1 [2020-11-30 01:54:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:14,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347949364] [2020-11-30 01:54:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031238967] [2020-11-30 01:54:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 01:54:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:54:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:14,275 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_44|]} [2020-11-30 01:54:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:14,286 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:14,286 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:14,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:14,347 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:14,350 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:14,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:14,389 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:14,389 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 01:54:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:14,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:15,106 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 01:54:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:15,115 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:15,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:15,117 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 01:54:15,117 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:15,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-11-30 01:54:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:15,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414966185] [2020-11-30 01:54:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:54:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:54:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:15,218 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_46|]} [2020-11-30 01:54:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:15,228 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:15,228 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:15,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:15,271 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 01:54:15,273 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:15,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:15,307 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:15,308 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 01:54:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:15,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:15,744 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 01:54:16,022 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 01:54:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:54:16,041 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:16,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:16,043 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 01:54:16,043 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:16,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:1 [2020-11-30 01:54:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:16,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 01:54:16,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 6, 6] total 17 [2020-11-30 01:54:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522486260] [2020-11-30 01:54:16,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:54:16,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:54:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:54:16,047 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 18 states. [2020-11-30 01:54:17,008 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-30 01:54:17,389 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-11-30 01:54:18,367 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-30 01:54:19,190 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-30 01:54:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:19,959 INFO L93 Difference]: Finished difference Result 228 states and 257 transitions. [2020-11-30 01:54:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:54:19,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 11 [2020-11-30 01:54:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:19,962 INFO L225 Difference]: With dead ends: 228 [2020-11-30 01:54:19,963 INFO L226 Difference]: Without dead ends: 228 [2020-11-30 01:54:19,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:54:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-30 01:54:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 84. [2020-11-30 01:54:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 01:54:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-11-30 01:54:19,971 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 11 [2020-11-30 01:54:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:19,972 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-11-30 01:54:19,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:54:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-11-30 01:54:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:54:19,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:19,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:20,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 01:54:20,598 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2020-11-30 01:54:20,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:20,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980902455] [2020-11-30 01:54:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:20,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:54:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:20,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:20,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:54:20,910 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-11-30 01:54:20,910 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:20,925 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-11-30 01:54:20,926 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:20,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:20,958 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-30 01:54:20,959 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:25 [2020-11-30 01:54:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:21,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980902455] [2020-11-30 01:54:21,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:21,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 01:54:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430344898] [2020-11-30 01:54:21,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:54:21,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:54:21,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:54:21,126 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 10 states. [2020-11-30 01:54:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:22,133 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2020-11-30 01:54:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:54:22,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-11-30 01:54:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:22,138 INFO L225 Difference]: With dead ends: 158 [2020-11-30 01:54:22,138 INFO L226 Difference]: Without dead ends: 158 [2020-11-30 01:54:22,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:54:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-30 01:54:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 84. [2020-11-30 01:54:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 01:54:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-11-30 01:54:22,146 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 12 [2020-11-30 01:54:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:22,147 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-11-30 01:54:22,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:54:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-11-30 01:54:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:54:22,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:22,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:22,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-11-30 01:54:22,348 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-11-30 01:54:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:22,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279971511] [2020-11-30 01:54:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:54:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:22,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:22,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279971511] [2020-11-30 01:54:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:22,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 01:54:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416268470] [2020-11-30 01:54:22,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:54:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:54:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:54:22,426 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-11-30 01:54:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:22,532 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-11-30 01:54:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:54:22,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-30 01:54:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:22,534 INFO L225 Difference]: With dead ends: 82 [2020-11-30 01:54:22,534 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 01:54:22,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:54:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 01:54:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-30 01:54:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-30 01:54:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-11-30 01:54:22,540 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 12 [2020-11-30 01:54:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:22,540 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-11-30 01:54:22,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:54:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-11-30 01:54:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:54:22,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:22,541 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:22,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-11-30 01:54:22,754 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-11-30 01:54:22,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:22,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636393241] [2020-11-30 01:54:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:54:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:22,847 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:22,848 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:22,848 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:22,890 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 01:54:22,892 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:22,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 01:54:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:23,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:23,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636393241] [2020-11-30 01:54:23,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452074777] [2020-11-30 01:54:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 01:54:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:54:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:23,698 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:23,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:23,699 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:23,737 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 01:54:23,738 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:23,739 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 01:54:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:23,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:23,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569680663] [2020-11-30 01:54:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:54:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:54:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:23,865 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:23,866 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:23,866 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:23,904 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 01:54:23,912 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:23,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 01:54:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:24,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:24,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 01:54:24,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 16 [2020-11-30 01:54:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925185513] [2020-11-30 01:54:24,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 01:54:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 01:54:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:54:24,922 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 17 states. [2020-11-30 01:54:26,152 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-11-30 01:54:26,387 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-11-30 01:54:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:26,856 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2020-11-30 01:54:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:54:26,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-11-30 01:54:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:26,859 INFO L225 Difference]: With dead ends: 135 [2020-11-30 01:54:26,859 INFO L226 Difference]: Without dead ends: 135 [2020-11-30 01:54:26,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:54:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-30 01:54:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 79. [2020-11-30 01:54:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 01:54:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-11-30 01:54:26,865 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 13 [2020-11-30 01:54:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:26,865 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-11-30 01:54:26,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 01:54:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-11-30 01:54:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:54:26,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:26,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:27,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:54:27,479 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2020-11-30 01:54:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824708849] [2020-11-30 01:54:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/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 [2020-11-30 01:54:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:54:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:27,604 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 01:54:27,604 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:27,604 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:27,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:27,615 INFO L545 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. [2020-11-30 01:54:27,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 01:54:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:27,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824708849] [2020-11-30 01:54:27,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:27,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 01:54:27,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104266935] [2020-11-30 01:54:27,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:54:27,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:54:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:54:27,689 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 5 states. [2020-11-30 01:54:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:27,862 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-11-30 01:54:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:27,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 01:54:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:27,863 INFO L225 Difference]: With dead ends: 78 [2020-11-30 01:54:27,863 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 01:54:27,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:54:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 01:54:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-30 01:54:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 01:54:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-11-30 01:54:27,868 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 14 [2020-11-30 01:54:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:27,868 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-11-30 01:54:27,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:54:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-11-30 01:54:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:54:27,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:27,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:28,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-11-30 01:54:28,070 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2020-11-30 01:54:28,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:28,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434213566] [2020-11-30 01:54:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:54:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:28,202 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:28,202 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:28,202 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:28,249 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 01:54:28,251 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:28,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 01:54:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:28,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434213566] [2020-11-30 01:54:28,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 01:54:28,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891650843] [2020-11-30 01:54:28,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:54:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:54:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:54:28,605 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-11-30 01:54:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:29,657 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-11-30 01:54:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:54:29,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 01:54:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:29,661 INFO L225 Difference]: With dead ends: 107 [2020-11-30 01:54:29,661 INFO L226 Difference]: Without dead ends: 107 [2020-11-30 01:54:29,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:54:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-30 01:54:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-11-30 01:54:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 01:54:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-11-30 01:54:29,665 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 14 [2020-11-30 01:54:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:29,666 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-11-30 01:54:29,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:54:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-11-30 01:54:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:54:29,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:29,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:29,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-11-30 01:54:29,887 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2020-11-30 01:54:29,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:29,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826839718] [2020-11-30 01:54:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:54:29,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:30,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:30,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826839718] [2020-11-30 01:54:30,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:30,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 01:54:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152857675] [2020-11-30 01:54:30,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:54:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:54:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:54:30,026 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 5 states. [2020-11-30 01:54:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:30,229 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-11-30 01:54:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:30,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-30 01:54:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:30,239 INFO L225 Difference]: With dead ends: 79 [2020-11-30 01:54:30,239 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 01:54:30,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:54:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 01:54:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-30 01:54:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 01:54:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-11-30 01:54:30,243 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 16 [2020-11-30 01:54:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:30,243 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-11-30 01:54:30,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:54:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-11-30 01:54:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:54:30,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:30,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:30,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-11-30 01:54:30,455 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2020-11-30 01:54:30,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:30,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818285347] [2020-11-30 01:54:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:54:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:30,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:30,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 01:54:30,815 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-11-30 01:54:30,815 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:30,835 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-11-30 01:54:30,836 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:30,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:30,890 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-30 01:54:30,891 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:25 [2020-11-30 01:54:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:31,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818285347] [2020-11-30 01:54:31,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:31,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-11-30 01:54:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347977816] [2020-11-30 01:54:31,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:54:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:54:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:54:31,119 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 12 states. [2020-11-30 01:54:31,688 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-11-30 01:54:32,409 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-11-30 01:54:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:32,475 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2020-11-30 01:54:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:54:32,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-30 01:54:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:32,478 INFO L225 Difference]: With dead ends: 138 [2020-11-30 01:54:32,478 INFO L226 Difference]: Without dead ends: 138 [2020-11-30 01:54:32,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:54:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-30 01:54:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 78. [2020-11-30 01:54:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 01:54:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-11-30 01:54:32,483 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 16 [2020-11-30 01:54:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:32,483 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-11-30 01:54:32,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:54:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-11-30 01:54:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:54:32,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:32,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:32,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-11-30 01:54:32,686 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2020-11-30 01:54:32,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:32,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977722784] [2020-11-30 01:54:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:54:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:32,800 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 01:54:32,801 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 01:54:32,801 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:32,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:32,807 INFO L545 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. [2020-11-30 01:54:32,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 01:54:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:32,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977722784] [2020-11-30 01:54:32,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:32,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 01:54:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314819860] [2020-11-30 01:54:32,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:54:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:54:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:54:32,847 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 5 states. [2020-11-30 01:54:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:32,977 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-11-30 01:54:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:54:32,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-30 01:54:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:32,979 INFO L225 Difference]: With dead ends: 77 [2020-11-30 01:54:32,979 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 01:54:32,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:54:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 01:54:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-30 01:54:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 01:54:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-11-30 01:54:32,983 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 18 [2020-11-30 01:54:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:32,983 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-11-30 01:54:32,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:54:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-11-30 01:54:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:54:32,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:32,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:33,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-11-30 01:54:33,185 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:33,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2020-11-30 01:54:33,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:33,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165637463] [2020-11-30 01:54:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:54:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:33,304 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:33,305 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 01:54:33,305 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:33,333 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 01:54:33,335 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:33,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 01:54:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:33,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:33,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165637463] [2020-11-30 01:54:33,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:33,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-11-30 01:54:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431476600] [2020-11-30 01:54:33,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:54:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:54:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:54:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:54:33,693 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 12 states. [2020-11-30 01:54:35,076 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-30 01:54:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:35,609 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-11-30 01:54:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:54:35,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-30 01:54:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:35,611 INFO L225 Difference]: With dead ends: 132 [2020-11-30 01:54:35,611 INFO L226 Difference]: Without dead ends: 132 [2020-11-30 01:54:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:54:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-30 01:54:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-11-30 01:54:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 01:54:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-11-30 01:54:35,616 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 18 [2020-11-30 01:54:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:35,617 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-11-30 01:54:35,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:54:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-11-30 01:54:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:54:35,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:35,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:35,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-11-30 01:54:35,831 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:54:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2020-11-30 01:54:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:54:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389286610] [2020-11-30 01:54:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-11-30 01:54:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:35,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:54:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:35,979 INFO L384 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 12 treesize of output 8 [2020-11-30 01:54:35,979 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:54:35,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:35,985 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:54:35,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2020-11-30 01:54:36,205 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:36,205 INFO L384 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 32 treesize of output 28 [2020-11-30 01:54:36,207 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 01:54:36,208 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 01:54:36,209 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:36,227 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:54:36,232 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:54:36,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:13 [2020-11-30 01:54:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:36,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:54:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389286610] [2020-11-30 01:54:36,576 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 01:54:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982046157] [2020-11-30 01:54:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 01:54:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 01:54:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:36,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a9516e8 [2020-11-30 01:54:36,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49093923] [2020-11-30 01:54:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1074453e-cda7-4112-97c3-f28fb9541f79/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:54:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:54:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:54:36,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a9516e8 [2020-11-30 01:54:36,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:36,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-30 01:54:36,804 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-11-30 01:54:36,804 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:54:37,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 cvc4 --incremental --print-success --lang smt --rewrite-divk,24 mathsat -unsat_core_generation=3 [2020-11-30 01:54:37,450 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-30 01:54:37,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:54:37 BoogieIcfgContainer [2020-11-30 01:54:37,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:54:37,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:54:37,452 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:54:37,452 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:54:37,452 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:05" (3/4) ... [2020-11-30 01:54:37,456 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:54:37,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:54:37,458 INFO L168 Benchmark]: Toolchain (without parser) took 34140.35 ms. Allocated memory was 71.3 MB in the beginning and 117.4 MB in the end (delta: 46.1 MB). Free memory was 51.7 MB in the beginning and 59.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:37,458 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 71.3 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 32.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:54:37,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.65 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 41.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:37,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.73 ms. Allocated memory is still 71.3 MB. Free memory was 41.8 MB in the beginning and 39.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:37,459 INFO L168 Benchmark]: Boogie Preprocessor took 78.53 ms. Allocated memory is still 71.3 MB. Free memory was 39.7 MB in the beginning and 38.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:54:37,460 INFO L168 Benchmark]: RCFGBuilder took 989.73 ms. Allocated memory is still 71.3 MB. Free memory was 38.3 MB in the beginning and 37.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:37,460 INFO L168 Benchmark]: TraceAbstraction took 32305.74 ms. Allocated memory was 71.3 MB in the beginning and 117.4 MB in the end (delta: 46.1 MB). Free memory was 36.7 MB in the beginning and 59.8 MB in the end (delta: -23.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:37,460 INFO L168 Benchmark]: Witness Printer took 5.08 ms. Allocated memory is still 117.4 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:54:37,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 71.3 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 32.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.65 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 41.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.73 ms. Allocated memory is still 71.3 MB. Free memory was 41.8 MB in the beginning and 39.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.53 ms. Allocated memory is still 71.3 MB. Free memory was 39.7 MB in the beginning and 38.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 989.73 ms. Allocated memory is still 71.3 MB. Free memory was 38.3 MB in the beginning and 37.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32305.74 ms. Allocated memory was 71.3 MB in the beginning and 117.4 MB in the end (delta: 46.1 MB). Free memory was 36.7 MB in the beginning and 59.8 MB in the end (delta: -23.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.08 ms. Allocated memory is still 117.4 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 516]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L522] int length1 = __VERIFIER_nondet_int(); [L523] int length2 = __VERIFIER_nondet_int(); [L524] COND TRUE length1 < 1 [L525] length1 = 1 [L527] COND TRUE length2 < 1 [L528] length2 = 1 [L530] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); [L531] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); [L533] int i = 0; [L533] COND FALSE !(i < length1 -1) [L537] int i = 0; [L537] COND FALSE !(i< length2 -1) [L542] nondetString1[length1-1] = '\0' [L543] nondetString2[length2-1] = '\0' [L516] EXPR \read(*s1) [L516] EXPR s2++ [L516] COND TRUE *s1 == *s2++ [L517] EXPR s1++ [L517] COND FALSE !(*s1++ == 0) [L516] \read(*s1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 32.2s, OverallIterations: 19, TraceHistogramMax: 2, AutomataDifference: 15.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 551 SDtfs, 3865 SDslu, 1179 SDs, 0 SdLazy, 1335 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 533 GetRequests, 358 SyntacticMatches, 10 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 607 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 259 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 474 ConstructedInterpolants, 12 QuantifiedInterpolants, 46740 SizeOfPredicates, 140 NumberOfNonLiveVariables, 961 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 44 InterpolantComputations, 32 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...