./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c --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_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:00:07,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:00:07,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:00:07,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:00:07,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:00:07,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:00:07,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:00:07,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:00:07,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:00:07,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:00:07,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:00:07,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:00:07,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:00:07,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:00:07,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:00:07,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:00:07,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:00:07,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:00:07,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:00:07,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:00:07,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:00:07,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:00:07,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:00:07,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:00:07,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:00:07,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:00:07,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:00:07,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:00:07,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:00:07,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:00:07,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:00:07,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:00:07,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:00:07,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:00:07,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:00:07,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:00:07,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:00:07,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:00:07,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:00:07,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:00:07,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:00:07,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:00:07,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:00:07,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:00:07,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:00:07,586 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:00:07,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:00:07,587 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:00:07,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:00:07,587 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:00:07,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:00:07,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:00:07,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:00:07,588 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:00:07,588 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:00:07,588 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:00:07,589 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:00:07,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:00:07,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:00:07,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:00:07,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:00:07,590 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:00:07,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:00:07,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:00:07,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:00:07,591 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:00:07,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:00:07,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:00:07,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:00:07,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:00:07,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:00:07,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:00:07,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:00:07,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:00:07,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:00:07,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:00:07,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:00:07,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:00:07,594 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:00:07,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:00:07,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:00:07,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:00:07,594 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_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2020-11-30 02:00:07,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:00:07,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:00:07,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:00:08,000 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:00:08,004 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:00:08,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-30 02:00:08,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/data/2f8e942ef/bf7516c4173040239e010acd06be2bbe/FLAGf8f5a6114 [2020-11-30 02:00:08,594 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:00:08,595 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-30 02:00:08,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/data/2f8e942ef/bf7516c4173040239e010acd06be2bbe/FLAGf8f5a6114 [2020-11-30 02:00:08,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/data/2f8e942ef/bf7516c4173040239e010acd06be2bbe [2020-11-30 02:00:08,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:00:08,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:00:08,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:00:08,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:00:08,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:00:08,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:00:08" (1/1) ... [2020-11-30 02:00:08,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6c2c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:08, skipping insertion in model container [2020-11-30 02:00:08,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:00:08" (1/1) ... [2020-11-30 02:00:08,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:00:08,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:00:09,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:00:09,215 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:00:09,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:00:09,262 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:00:09,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09 WrapperNode [2020-11-30 02:00:09,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:00:09,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:00:09,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:00:09,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:00:09,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:00:09,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:00:09,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:00:09,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:00:09,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... [2020-11-30 02:00:09,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:00:09,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:00:09,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:00:09,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:00:09,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:09,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:00:09,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:00:09,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:00:09,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:00:09,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:00:09,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:00:10,151 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:00:10,151 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:00:10,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:00:10 BoogieIcfgContainer [2020-11-30 02:00:10,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:00:10,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:00:10,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:00:10,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:00:10,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:00:08" (1/3) ... [2020-11-30 02:00:10,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2509d102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:00:10, skipping insertion in model container [2020-11-30 02:00:10,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:00:09" (2/3) ... [2020-11-30 02:00:10,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2509d102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:00:10, skipping insertion in model container [2020-11-30 02:00:10,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:00:10" (3/3) ... [2020-11-30 02:00:10,167 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-11-30 02:00:10,183 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:00:10,188 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:00:10,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:00:10,235 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:00:10,235 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:00:10,236 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:00:10,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:00:10,236 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:00:10,236 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:00:10,236 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:00:10,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:00:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-30 02:00:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:00:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:10,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:00:10,266 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash 3118125, now seen corresponding path program 1 times [2020-11-30 02:00:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:10,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388067069] [2020-11-30 02:00:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:10,472 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 02:00:10,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388067069] [2020-11-30 02:00:10,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:10,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:00:10,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189697100] [2020-11-30 02:00:10,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:00:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:00:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:00:10,502 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-30 02:00:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:10,601 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-30 02:00:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:00:10,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:00:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:10,613 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:00:10,613 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:00:10,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:00:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:00:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-30 02:00:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:00:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 02:00:10,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-30 02:00:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:10,650 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 02:00:10,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:00:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 02:00:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:00:10,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:10,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:00:10,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:00:10,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2020-11-30 02:00:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:10,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434570005] [2020-11-30 02:00:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:10,704 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 02:00:10,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434570005] [2020-11-30 02:00:10,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:10,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:00:10,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950178596] [2020-11-30 02:00:10,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:00:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:00:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:00:10,708 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-30 02:00:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:10,736 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-30 02:00:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:00:10,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:00:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:10,738 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:00:10,738 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 02:00:10,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:00:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 02:00:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-11-30 02:00:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:00:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:00:10,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-11-30 02:00:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:10,745 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:00:10,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:00:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:00:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:00:10,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:10,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:00:10,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:00:10,746 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 3050899, now seen corresponding path program 1 times [2020-11-30 02:00:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:10,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610594316] [2020-11-30 02:00:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:10,789 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 02:00:10,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610594316] [2020-11-30 02:00:10,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:10,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:00:10,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806715685] [2020-11-30 02:00:10,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:00:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:00:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:00:10,792 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-11-30 02:00:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:10,849 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-11-30 02:00:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:00:10,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:00:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:10,850 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:00:10,850 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:00:10,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:00:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:00:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-30 02:00:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:00:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:00:10,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-11-30 02:00:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:00:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:00:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:00:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:00:10,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:10,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:00:10,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:00:10,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 94514992, now seen corresponding path program 1 times [2020-11-30 02:00:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:10,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414373737] [2020-11-30 02:00:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:10,928 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 02:00:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414373737] [2020-11-30 02:00:10,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:10,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:00:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017124850] [2020-11-30 02:00:10,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:00:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:00:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:00:10,931 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-11-30 02:00:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:10,993 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 02:00:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:00:10,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:00:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:10,994 INFO L225 Difference]: With dead ends: 21 [2020-11-30 02:00:10,994 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 02:00:10,995 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 02:00:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 02:00:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 02:00:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:00:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-30 02:00:10,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2020-11-30 02:00:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:10,999 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-30 02:00:10,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:00:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-30 02:00:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:00:10,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:11,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:00:11,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:00:11,000 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 94514993, now seen corresponding path program 1 times [2020-11-30 02:00:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:11,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844951519] [2020-11-30 02:00:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:11,067 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 02:00:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844951519] [2020-11-30 02:00:11,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:11,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:00:11,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621061489] [2020-11-30 02:00:11,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:00:11,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:11,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:00:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:00:11,069 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-11-30 02:00:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:11,204 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 02:00:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:00:11,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:00:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:11,205 INFO L225 Difference]: With dead ends: 22 [2020-11-30 02:00:11,205 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 02:00:11,206 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 02:00:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 02:00:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 02:00:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:00:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:00:11,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2020-11-30 02:00:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:11,210 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:00:11,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:00:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:00:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:00:11,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:11,211 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-30 02:00:11,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:00:11,212 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 634647528, now seen corresponding path program 1 times [2020-11-30 02:00:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978561677] [2020-11-30 02:00:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:11,288 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 02:00:11,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978561677] [2020-11-30 02:00:11,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127618862] [2020-11-30 02:00:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:00:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:11,381 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 02:00:11,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:11,474 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 02:00:11,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078272259] [2020-11-30 02:00:11,499 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 02:00:11,499 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:11,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:11,511 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:11,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:12,317 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:12,457 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-30 02:00:12,669 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-11-30 02:00:12,873 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-11-30 02:00:12,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:12,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2020-11-30 02:00:12,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045505112] [2020-11-30 02:00:12,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:00:12,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:00:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:00:12,904 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-11-30 02:00:13,178 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-11-30 02:00:13,446 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-30 02:00:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:13,575 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-30 02:00:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:00:13,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:00:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:13,576 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:00:13,576 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:00:13,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:00:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:00:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-11-30 02:00:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 02:00:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-11-30 02:00:13,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2020-11-30 02:00:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:13,580 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-11-30 02:00:13,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:00:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-30 02:00:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:00:13,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:13,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-30 02:00:13,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:00:13,806 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1800763058, now seen corresponding path program 1 times [2020-11-30 02:00:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:13,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149868817] [2020-11-30 02:00:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:00:13,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149868817] [2020-11-30 02:00:13,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:00:13,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:00:13,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448260013] [2020-11-30 02:00:13,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:00:13,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:13,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:00:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:00:13,893 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-11-30 02:00:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:13,985 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 02:00:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:00:13,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 02:00:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:13,988 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:00:13,988 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:00:13,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:00:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:00:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-11-30 02:00:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:00:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 02:00:13,992 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-11-30 02:00:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:13,992 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 02:00:13,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:00:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 02:00:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:00:13,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:13,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:13,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-30 02:00:13,993 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 400365424, now seen corresponding path program 1 times [2020-11-30 02:00:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:13,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320286860] [2020-11-30 02:00:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:14,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320286860] [2020-11-30 02:00:14,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433266981] [2020-11-30 02:00:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:00:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:14,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:14,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:00:14,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2020-11-30 02:00:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653680741] [2020-11-30 02:00:14,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:00:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:00:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:00:14,183 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-11-30 02:00:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:14,215 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-30 02:00:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:00:14,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-30 02:00:14,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:14,220 INFO L225 Difference]: With dead ends: 23 [2020-11-30 02:00:14,220 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 02:00:14,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:00:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 02:00:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 02:00:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:00:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 02:00:14,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-11-30 02:00:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:14,223 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 02:00:14,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:00:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 02:00:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:00:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:14,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:14,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:14,436 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash 400365425, now seen corresponding path program 1 times [2020-11-30 02:00:14,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:14,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555625040] [2020-11-30 02:00:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555625040] [2020-11-30 02:00:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322039045] [2020-11-30 02:00:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:00:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:14,621 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 02:00:14,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:14,662 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 02:00:14,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951736655] [2020-11-30 02:00:14,665 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:00:14,665 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:14,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:14,666 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:14,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:14,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:15,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:15,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:15,966 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:16,592 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-30 02:00:16,789 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-30 02:00:16,982 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:00:17,249 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-30 02:00:17,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:17,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4, 4] total 13 [2020-11-30 02:00:17,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272601696] [2020-11-30 02:00:17,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:00:17,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:17,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:00:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:00:17,401 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-11-30 02:00:17,990 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-11-30 02:00:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:18,113 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-30 02:00:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:00:18,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-30 02:00:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:18,114 INFO L225 Difference]: With dead ends: 24 [2020-11-30 02:00:18,114 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 02:00:18,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:00:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 02:00:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-30 02:00:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:00:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:00:18,118 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-11-30 02:00:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:18,119 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:00:18,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:00:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:00:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:00:18,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:18,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:18,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-30 02:00:18,344 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1795882651, now seen corresponding path program 1 times [2020-11-30 02:00:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:18,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796529036] [2020-11-30 02:00:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796529036] [2020-11-30 02:00:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140362717] [2020-11-30 02:00:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:00:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:18,505 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 02:00:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:18,540 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 02:00:18,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69345389] [2020-11-30 02:00:18,546 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:00:18,546 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:18,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:18,547 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:18,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:18,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:18,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:18,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:19,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:19,847 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:20,499 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-30 02:00:20,671 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-30 02:00:20,865 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:00:21,137 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-30 02:00:21,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:21,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:21,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2020-11-30 02:00:21,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941294856] [2020-11-30 02:00:21,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:00:21,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:00:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:00:21,577 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-11-30 02:00:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:21,884 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-11-30 02:00:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:00:21,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 02:00:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:21,886 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:00:21,886 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 02:00:21,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:00:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 02:00:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-11-30 02:00:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 02:00:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-30 02:00:21,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2020-11-30 02:00:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:21,901 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-30 02:00:21,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:00:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-30 02:00:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 02:00:21,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:21,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1] [2020-11-30 02:00:22,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:22,107 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:22,107 INFO L82 PathProgramCache]: Analyzing trace with hash -982673158, now seen corresponding path program 1 times [2020-11-30 02:00:22,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:22,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475909143] [2020-11-30 02:00:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:00:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475909143] [2020-11-30 02:00:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931758285] [2020-11-30 02:00:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:00:22,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:00:22,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:00:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043033650] [2020-11-30 02:00:22,573 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:00:22,573 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:22,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:22,576 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:22,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:22,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:22,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:22,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:23,474 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:23,722 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-11-30 02:00:24,247 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-30 02:00:24,375 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-30 02:00:24,529 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:00:24,904 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-30 02:00:25,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:25,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:25,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-11-30 02:00:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280401422] [2020-11-30 02:00:25,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:00:25,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:00:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:00:25,100 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 17 states. [2020-11-30 02:00:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:25,208 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-11-30 02:00:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:00:25,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-11-30 02:00:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:25,217 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:00:25,217 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 02:00:25,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:00:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 02:00:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-30 02:00:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:00:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-11-30 02:00:25,226 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 31 [2020-11-30 02:00:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:25,227 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-11-30 02:00:25,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:00:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-11-30 02:00:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-30 02:00:25,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:25,235 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 1, 1, 1] [2020-11-30 02:00:25,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-30 02:00:25,445 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2066593926, now seen corresponding path program 2 times [2020-11-30 02:00:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:25,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626132792] [2020-11-30 02:00:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-11-30 02:00:25,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626132792] [2020-11-30 02:00:25,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247302938] [2020-11-30 02:00:25,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:25,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:00:25,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:25,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:00:25,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-30 02:00:26,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-30 02:00:26,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:00:26,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 3] total 19 [2020-11-30 02:00:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132799883] [2020-11-30 02:00:26,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:00:26,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:00:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:00:26,396 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 5 states. [2020-11-30 02:00:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:26,466 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-11-30 02:00:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:00:26,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-11-30 02:00:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:26,468 INFO L225 Difference]: With dead ends: 77 [2020-11-30 02:00:26,468 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 02:00:26,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:00:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 02:00:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-30 02:00:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 02:00:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-11-30 02:00:26,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 67 [2020-11-30 02:00:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:26,477 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-11-30 02:00:26,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:00:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-11-30 02:00:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-30 02:00:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:26,480 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:26,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:26,700 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:00:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -162298974, now seen corresponding path program 2 times [2020-11-30 02:00:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:26,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13745997] [2020-11-30 02:00:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 323 proven. 145 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-30 02:00:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13745997] [2020-11-30 02:00:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99339078] [2020-11-30 02:00:27,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/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 02:00:27,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 02:00:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:27,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:00:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:27,325 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-11-30 02:00:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2020-11-30 02:00:27,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2020-11-30 02:00:27,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:00:27,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [13] total 17 [2020-11-30 02:00:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187686257] [2020-11-30 02:00:27,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:00:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:00:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:00:27,699 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 6 states. [2020-11-30 02:00:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:27,863 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-11-30 02:00:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:00:27,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-11-30 02:00:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:27,865 INFO L225 Difference]: With dead ends: 76 [2020-11-30 02:00:27,865 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:00:27,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:00:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:00:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:00:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:00:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:00:27,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2020-11-30 02:00:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:27,867 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:00:27,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:00:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:00:27,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:00:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:28,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:00:28 BoogieIcfgContainer [2020-11-30 02:00:28,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:00:28,073 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:00:28,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:00:28,074 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:00:28,074 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:00:10" (3/4) ... [2020-11-30 02:00:28,078 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:00:28,088 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 02:00:28,089 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:00:28,089 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:00:28,142 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2fb1cd89-e4a8-4397-8a0f-cdb10b162c73/bin/utaipan/witness.graphml [2020-11-30 02:00:28,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:00:28,143 INFO L168 Benchmark]: Toolchain (without parser) took 19187.72 ms. Allocated memory was 96.5 MB in the beginning and 224.4 MB in the end (delta: 127.9 MB). Free memory was 61.8 MB in the beginning and 138.4 MB in the end (delta: -76.7 MB). Peak memory consumption was 52.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,144 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 78.0 MB in the beginning and 77.9 MB in the end (delta: 78.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:00:28,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.51 ms. Allocated memory is still 96.5 MB. Free memory was 61.6 MB in the beginning and 74.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,146 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.52 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 73.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:00:28,147 INFO L168 Benchmark]: Boogie Preprocessor took 47.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,148 INFO L168 Benchmark]: RCFGBuilder took 788.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 50.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,148 INFO L168 Benchmark]: TraceAbstraction took 17914.63 ms. Allocated memory was 96.5 MB in the beginning and 224.4 MB in the end (delta: 127.9 MB). Free memory was 50.3 MB in the beginning and 141.6 MB in the end (delta: -91.3 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,149 INFO L168 Benchmark]: Witness Printer took 69.12 ms. Allocated memory is still 224.4 MB. Free memory was 141.6 MB in the beginning and 138.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:00:28,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 78.0 MB in the beginning and 77.9 MB in the end (delta: 78.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.51 ms. Allocated memory is still 96.5 MB. Free memory was 61.6 MB in the beginning and 74.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.52 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 73.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 788.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 50.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17914.63 ms. Allocated memory was 96.5 MB in the beginning and 224.4 MB in the end (delta: 127.9 MB). Free memory was 50.3 MB in the beginning and 141.6 MB in the end (delta: -91.3 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. * Witness Printer took 69.12 ms. Allocated memory is still 224.4 MB. Free memory was 141.6 MB in the beginning and 138.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.8s, OverallIterations: 13, TraceHistogramMax: 20, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 256 SDslu, 126 SDs, 0 SdLazy, 377 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 540 GetRequests, 410 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 61 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 448 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 630 ConstructedInterpolants, 67 QuantifiedInterpolants, 492417 SizeOfPredicates, 11 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 3328/4020 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: OVERALL_TIME[ms]: 2121, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME[ms]: 963, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 45, TOOLS_QUANTIFIERELIM_TIME[ms]: 936, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 198, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 84, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 501, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME[ms]: 504, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME[ms]: 34, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME[ms]: 51, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1626, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1625, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 18, DAG_COMPRESSION_PROCESSED_NODES: 110, DAG_COMPRESSION_RETAINED_NODES: 51, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...