./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:18:04,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:18:04,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:18:04,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:18:04,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:18:04,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:18:04,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:18:04,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:18:04,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:18:04,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:18:04,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:18:04,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:18:04,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:18:04,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:18:04,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:18:04,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:18:04,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:18:04,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:18:04,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:18:04,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:18:04,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:18:04,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:18:04,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:18:04,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:18:04,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:18:04,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:18:04,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:18:04,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:18:04,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:18:04,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:18:04,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:18:04,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:18:04,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:18:04,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:18:04,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:18:04,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:18:04,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:18:04,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:18:04,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:18:04,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:18:04,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:18:04,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:18:04,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:18:04,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:18:04,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:18:04,309 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:18:04,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:18:04,309 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:18:04,310 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:18:04,310 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:18:04,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:18:04,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:18:04,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:18:04,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:18:04,311 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:18:04,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:18:04,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:18:04,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:18:04,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:18:04,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:18:04,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:18:04,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:18:04,314 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_e6a60cd8-0869-4f13-97ba-305a80c900fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-12-09 05:18:04,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:18:04,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:18:04,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:18:04,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:18:04,510 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:18:04,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-09 05:18:04,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/data/f4c77bd3c/ceca0ad75c3345938474b10f246fac2b/FLAG6fbc366cf [2020-12-09 05:18:04,922 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:18:04,922 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-12-09 05:18:04,927 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/data/f4c77bd3c/ceca0ad75c3345938474b10f246fac2b/FLAG6fbc366cf [2020-12-09 05:18:04,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/data/f4c77bd3c/ceca0ad75c3345938474b10f246fac2b [2020-12-09 05:18:04,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:18:04,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:18:04,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:18:04,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:18:04,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:18:04,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:18:04" (1/1) ... [2020-12-09 05:18:04,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce463ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:04, skipping insertion in model container [2020-12-09 05:18:04,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:18:04" (1/1) ... [2020-12-09 05:18:04,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:18:04,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:18:05,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:18:05,076 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:18:05,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:18:05,099 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:18:05,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05 WrapperNode [2020-12-09 05:18:05,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:18:05,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:18:05,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:18:05,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:18:05,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:18:05,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:18:05,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:18:05,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:18:05,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... [2020-12-09 05:18:05,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:18:05,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:18:05,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:18:05,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:18:05,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:18:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:18:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:18:05,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:18:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 05:18:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:18:05,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:18:05,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:18:05,453 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 05:18:05,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:18:05 BoogieIcfgContainer [2020-12-09 05:18:05,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:18:05,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:18:05,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:18:05,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:18:05,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:18:04" (1/3) ... [2020-12-09 05:18:05,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dab7a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:18:05, skipping insertion in model container [2020-12-09 05:18:05,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:18:05" (2/3) ... [2020-12-09 05:18:05,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dab7a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:18:05, skipping insertion in model container [2020-12-09 05:18:05,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:18:05" (3/3) ... [2020-12-09 05:18:05,460 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-12-09 05:18:05,470 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:18:05,472 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 05:18:05,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 05:18:05,495 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:18:05,495 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:18:05,495 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:18:05,495 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:18:05,495 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:18:05,495 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:18:05,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:18:05,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:18:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 05:18:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:18:05,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:05,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:18:05,509 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]=== [2020-12-09 05:18:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-12-09 05:18:05,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:05,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14040195] [2020-12-09 05:18:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:05,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14040195] [2020-12-09 05:18:05,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:18:05,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:18:05,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240541065] [2020-12-09 05:18:05,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:18:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:18:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:05,632 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 05:18:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:05,672 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-09 05:18:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:18:05,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 05:18:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:05,678 INFO L225 Difference]: With dead ends: 37 [2020-12-09 05:18:05,679 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 05:18:05,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 05:18:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-09 05:18:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 05:18:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 05:18:05,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 05:18:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:05,702 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 05:18:05,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:18:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 05:18:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:18:05,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:05,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:18:05,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:18:05,702 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]=== [2020-12-09 05:18:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-12-09 05:18:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497693063] [2020-12-09 05:18:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497693063] [2020-12-09 05:18:05,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:18:05,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:18:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820828088] [2020-12-09 05:18:05,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:18:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:18:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:18:05,745 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-09 05:18:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:05,792 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-09 05:18:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:18:05,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 05:18:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:05,793 INFO L225 Difference]: With dead ends: 45 [2020-12-09 05:18:05,793 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 05:18:05,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:18:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 05:18:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2020-12-09 05:18:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 05:18:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-09 05:18:05,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2020-12-09 05:18:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:05,797 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-09 05:18:05,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:18:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-09 05:18:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:18:05,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:05,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:18:05,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:18:05,798 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]=== [2020-12-09 05:18:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-12-09 05:18:05,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:05,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466473427] [2020-12-09 05:18:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:05,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466473427] [2020-12-09 05:18:05,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:18:05,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:18:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317498543] [2020-12-09 05:18:05,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:18:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:18:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:05,830 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-12-09 05:18:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:05,844 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-09 05:18:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:18:05,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 05:18:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:05,845 INFO L225 Difference]: With dead ends: 19 [2020-12-09 05:18:05,845 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 05:18:05,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 05:18:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 05:18:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 05:18:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 05:18:05,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-12-09 05:18:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:05,847 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 05:18:05,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:18:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 05:18:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:18:05,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:05,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:18:05,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:18:05,848 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]=== [2020-12-09 05:18:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash 3080753, now seen corresponding path program 1 times [2020-12-09 05:18:05,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:05,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036934105] [2020-12-09 05:18:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:05,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036934105] [2020-12-09 05:18:05,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:18:05,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:18:05,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158604550] [2020-12-09 05:18:05,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:18:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:18:05,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:18:05,899 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-12-09 05:18:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:05,928 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-09 05:18:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:18:05,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 05:18:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:05,930 INFO L225 Difference]: With dead ends: 20 [2020-12-09 05:18:05,930 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 05:18:05,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:18:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 05:18:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 05:18:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 05:18:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 05:18:05,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 05:18:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:05,934 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 05:18:05,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:18:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 05:18:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:18:05,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:05,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:05,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:18:05,935 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]=== [2020-12-09 05:18:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1585672413, now seen corresponding path program 1 times [2020-12-09 05:18:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:05,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244479084] [2020-12-09 05:18:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244479084] [2020-12-09 05:18:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401702834] [2020-12-09 05:18:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 05:18:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:06,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:06,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599440851] [2020-12-09 05:18:06,069 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:06,069 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:06,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:06,076 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:06,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:06,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:06,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:06,537 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:06,976 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2020-12-09 05:18:07,346 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2020-12-09 05:18:07,581 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-12-09 05:18:07,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:07,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-09 05:18:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120954639] [2020-12-09 05:18:07,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:18:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:18:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:18:07,584 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-09 05:18:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:07,661 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-09 05:18:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:18:07,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 05:18:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:07,662 INFO L225 Difference]: With dead ends: 25 [2020-12-09 05:18:07,663 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 05:18:07,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:18:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 05:18:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-09 05:18:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 05:18:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 05:18:07,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-09 05:18:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:07,665 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 05:18:07,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:18:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 05:18:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:18:07,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:07,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:07,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:07,868 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]=== [2020-12-09 05:18:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 596146973, now seen corresponding path program 1 times [2020-12-09 05:18:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:07,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614810123] [2020-12-09 05:18:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:07,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614810123] [2020-12-09 05:18:07,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357801942] [2020-12-09 05:18:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:07,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:18:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:08,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:18:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611313631] [2020-12-09 05:18:08,050 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:08,051 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:08,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:08,051 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:08,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:08,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:08,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:08,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:08,687 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:09,053 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:09,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:09,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 05:18:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267056314] [2020-12-09 05:18:09,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 05:18:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 05:18:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-09 05:18:09,410 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-12-09 05:18:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:09,558 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-09 05:18:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 05:18:09,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-09 05:18:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:09,560 INFO L225 Difference]: With dead ends: 64 [2020-12-09 05:18:09,560 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 05:18:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-12-09 05:18:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 05:18:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-12-09 05:18:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 05:18:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-09 05:18:09,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2020-12-09 05:18:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:09,566 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-09 05:18:09,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 05:18:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-09 05:18:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:18:09,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:09,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:09,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:09,768 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]=== [2020-12-09 05:18:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash 596149066, now seen corresponding path program 1 times [2020-12-09 05:18:09,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:09,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914020541] [2020-12-09 05:18:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914020541] [2020-12-09 05:18:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448820034] [2020-12-09 05:18:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:09,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 05:18:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:09,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:10,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966572883] [2020-12-09 05:18:10,020 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:10,020 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:10,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:10,020 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:10,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:10,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:10,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:10,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:10,486 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:10,837 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:11,201 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:11,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2020-12-09 05:18:11,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461435160] [2020-12-09 05:18:11,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 05:18:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 05:18:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-09 05:18:11,203 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-12-09 05:18:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:11,271 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-12-09 05:18:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:18:11,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-09 05:18:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:11,272 INFO L225 Difference]: With dead ends: 61 [2020-12-09 05:18:11,272 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 05:18:11,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-09 05:18:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 05:18:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-12-09 05:18:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 05:18:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-12-09 05:18:11,276 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 10 [2020-12-09 05:18:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:11,276 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-12-09 05:18:11,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 05:18:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-12-09 05:18:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:18:11,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:11,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:11,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:11,479 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]=== [2020-12-09 05:18:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 188329252, now seen corresponding path program 1 times [2020-12-09 05:18:11,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:11,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979202719] [2020-12-09 05:18:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:18:11,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979202719] [2020-12-09 05:18:11,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747944674] [2020-12-09 05:18:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/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 [2020-12-09 05:18:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 05:18:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:11,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:11,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573963769] [2020-12-09 05:18:11,603 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 05:18:11,603 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:11,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:11,603 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:11,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:11,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:11,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:11,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:12,023 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:12,276 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:12,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:12,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 4] total 16 [2020-12-09 05:18:12,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564045587] [2020-12-09 05:18:12,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:18:12,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:18:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-12-09 05:18:12,668 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 8 states. [2020-12-09 05:18:12,897 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-12-09 05:18:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:12,968 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-12-09 05:18:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 05:18:12,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 05:18:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:12,970 INFO L225 Difference]: With dead ends: 54 [2020-12-09 05:18:12,970 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 05:18:12,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-12-09 05:18:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 05:18:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-09 05:18:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 05:18:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-12-09 05:18:12,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-12-09 05:18:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:12,973 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-12-09 05:18:12,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:18:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-12-09 05:18:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:18:12,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:12,974 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 05:18:13,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-09 05:18:13,176 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]=== [2020-12-09 05:18:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 188258073, now seen corresponding path program 2 times [2020-12-09 05:18:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24896788] [2020-12-09 05:18:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:13,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24896788] [2020-12-09 05:18:13,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:18:13,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:18:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089383810] [2020-12-09 05:18:13,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:18:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:18:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:13,227 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 3 states. [2020-12-09 05:18:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:13,240 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2020-12-09 05:18:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:18:13,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-09 05:18:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:13,241 INFO L225 Difference]: With dead ends: 81 [2020-12-09 05:18:13,241 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 05:18:13,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:18:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 05:18:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-12-09 05:18:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 05:18:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-12-09 05:18:13,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 13 [2020-12-09 05:18:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:13,245 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-12-09 05:18:13,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:18:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-12-09 05:18:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:18:13,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:13,246 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 05:18:13,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2020-12-09 05:18:13,246 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]=== [2020-12-09 05:18:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash 521636203, now seen corresponding path program 3 times [2020-12-09 05:18:13,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:13,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707090543] [2020-12-09 05:18:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:18:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707090543] [2020-12-09 05:18:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78018140] [2020-12-09 05:18:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/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 [2020-12-09 05:18:13,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 05:18:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:18:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 05:18:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:18:13,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:18:13,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722233857] [2020-12-09 05:18:13,343 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:13,343 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:13,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:13,344 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:13,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:13,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:13,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:13,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:13,787 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:14,118 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:14,458 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:14,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:14,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 05:18:14,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186540395] [2020-12-09 05:18:14,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:18:14,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:18:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-09 05:18:14,460 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 8 states. [2020-12-09 05:18:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:14,518 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-09 05:18:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:18:14,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 05:18:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:14,519 INFO L225 Difference]: With dead ends: 52 [2020-12-09 05:18:14,519 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 05:18:14,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-09 05:18:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 05:18:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-12-09 05:18:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 05:18:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-12-09 05:18:14,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 13 [2020-12-09 05:18:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:14,522 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-12-09 05:18:14,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:18:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-12-09 05:18:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:18:14,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:14,523 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-09 05:18:14,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-12-09 05:18:14,724 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]=== [2020-12-09 05:18:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033020, now seen corresponding path program 1 times [2020-12-09 05:18:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:14,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833536638] [2020-12-09 05:18:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:14,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833536638] [2020-12-09 05:18:14,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264045347] [2020-12-09 05:18:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/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 [2020-12-09 05:18:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 05:18:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:14,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:14,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488781001] [2020-12-09 05:18:14,823 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:14,823 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:14,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:14,824 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:14,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:14,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:14,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:14,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:15,209 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:15,545 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:15,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:15,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:15,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-12-09 05:18:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277654352] [2020-12-09 05:18:15,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:18:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:18:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-09 05:18:15,888 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2020-12-09 05:18:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:15,909 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-09 05:18:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:18:15,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 05:18:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:15,910 INFO L225 Difference]: With dead ends: 44 [2020-12-09 05:18:15,910 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 05:18:15,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:18:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 05:18:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 05:18:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 05:18:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-09 05:18:15,913 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2020-12-09 05:18:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:15,913 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-09 05:18:15,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:18:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-09 05:18:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:18:15,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:15,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-09 05:18:16,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-12-09 05:18:16,115 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]=== [2020-12-09 05:18:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033021, now seen corresponding path program 1 times [2020-12-09 05:18:16,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:16,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385449552] [2020-12-09 05:18:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385449552] [2020-12-09 05:18:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635293103] [2020-12-09 05:18:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/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 [2020-12-09 05:18:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 05:18:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:16,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246885685] [2020-12-09 05:18:16,236 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:16,237 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:16,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:16,237 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:16,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:16,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:16,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:16,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:16,617 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:16,947 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:17,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:17,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:17,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 05:18:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505173875] [2020-12-09 05:18:17,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:18:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:18:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:18:17,285 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-12-09 05:18:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:17,339 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-12-09 05:18:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:18:17,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 05:18:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:17,340 INFO L225 Difference]: With dead ends: 73 [2020-12-09 05:18:17,340 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 05:18:17,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-09 05:18:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 05:18:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-12-09 05:18:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 05:18:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-12-09 05:18:17,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 14 [2020-12-09 05:18:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:17,343 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-12-09 05:18:17,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:18:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-12-09 05:18:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 05:18:17,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:17,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:17,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:17,545 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]=== [2020-12-09 05:18:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash 595785087, now seen corresponding path program 1 times [2020-12-09 05:18:17,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:17,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355774661] [2020-12-09 05:18:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:17,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355774661] [2020-12-09 05:18:17,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873985200] [2020-12-09 05:18:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 05:18:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:18:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444426447] [2020-12-09 05:18:17,639 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 05:18:17,639 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:17,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:17,640 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:17,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:17,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:17,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:17,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:18,072 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:18,337 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:18,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:18,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:18,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 05:18:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656559460] [2020-12-09 05:18:18,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 05:18:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 05:18:18,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-09 05:18:18,834 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 9 states. [2020-12-09 05:18:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:18,891 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-09 05:18:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 05:18:18,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-09 05:18:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:18,892 INFO L225 Difference]: With dead ends: 103 [2020-12-09 05:18:18,892 INFO L226 Difference]: Without dead ends: 103 [2020-12-09 05:18:18,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-09 05:18:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-09 05:18:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-12-09 05:18:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 05:18:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-12-09 05:18:18,897 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 15 [2020-12-09 05:18:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:18,898 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-12-09 05:18:18,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 05:18:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-12-09 05:18:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 05:18:18,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:18,898 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2020-12-09 05:18:19,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2020-12-09 05:18:19,100 INFO L429 AbstractCegarLoop]: === Iteration 14 === [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]=== [2020-12-09 05:18:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -830929546, now seen corresponding path program 4 times [2020-12-09 05:18:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:19,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181025319] [2020-12-09 05:18:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:19,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181025319] [2020-12-09 05:18:19,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844137992] [2020-12-09 05:18:19,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:18:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 05:18:19,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575549461] [2020-12-09 05:18:19,218 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:19,218 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:19,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:19,218 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:19,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:19,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:19,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:19,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:19,599 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:19,915 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:20,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:20,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:20,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 05:18:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138862393] [2020-12-09 05:18:20,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:18:20,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:18:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:18:20,244 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 6 states. [2020-12-09 05:18:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:20,283 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2020-12-09 05:18:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:18:20,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 05:18:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:20,285 INFO L225 Difference]: With dead ends: 194 [2020-12-09 05:18:20,285 INFO L226 Difference]: Without dead ends: 194 [2020-12-09 05:18:20,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-09 05:18:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-09 05:18:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 100. [2020-12-09 05:18:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-09 05:18:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-12-09 05:18:20,290 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 16 [2020-12-09 05:18:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:20,290 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-12-09 05:18:20,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:18:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-12-09 05:18:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 05:18:20,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:20,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-12-09 05:18:20,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:20,492 INFO L429 AbstractCegarLoop]: === Iteration 15 === [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]=== [2020-12-09 05:18:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash 924819805, now seen corresponding path program 2 times [2020-12-09 05:18:20,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:20,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583265870] [2020-12-09 05:18:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 05:18:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583265870] [2020-12-09 05:18:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174813452] [2020-12-09 05:18:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:20,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 05:18:20,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:18:20,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 05:18:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 05:18:20,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 05:18:20,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491591716] [2020-12-09 05:18:20,681 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:20,681 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:20,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:20,681 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:20,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:20,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:20,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:20,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:21,097 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:21,457 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:21,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:21,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:21,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2020-12-09 05:18:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215994605] [2020-12-09 05:18:21,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 05:18:21,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 05:18:21,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-09 05:18:21,807 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 12 states. [2020-12-09 05:18:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:21,870 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-12-09 05:18:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:18:21,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-09 05:18:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:21,871 INFO L225 Difference]: With dead ends: 98 [2020-12-09 05:18:21,871 INFO L226 Difference]: Without dead ends: 98 [2020-12-09 05:18:21,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-12-09 05:18:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-09 05:18:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2020-12-09 05:18:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 05:18:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-09 05:18:21,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-12-09 05:18:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:21,874 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-09 05:18:21,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 05:18:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-09 05:18:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 05:18:21,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:21,874 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2020-12-09 05:18:22,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2020-12-09 05:18:22,076 INFO L429 AbstractCegarLoop]: === Iteration 16 === [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]=== [2020-12-09 05:18:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1432583701, now seen corresponding path program 2 times [2020-12-09 05:18:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:22,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253177302] [2020-12-09 05:18:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-09 05:18:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253177302] [2020-12-09 05:18:22,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637592524] [2020-12-09 05:18:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:22,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 05:18:22,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:18:22,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 05:18:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 05:18:22,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 05:18:22,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682581987] [2020-12-09 05:18:22,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:18:22,342 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:18:22,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:18:22,342 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:18:22,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:18:22,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:22,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:22,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:18:22,728 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:18:23,129 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 05:18:23,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:18:23,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:18:23,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2020-12-09 05:18:23,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050453648] [2020-12-09 05:18:23,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 05:18:23,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 05:18:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-12-09 05:18:23,497 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 14 states. [2020-12-09 05:18:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:23,847 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-09 05:18:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 05:18:23,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-09 05:18:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:23,848 INFO L225 Difference]: With dead ends: 74 [2020-12-09 05:18:23,848 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 05:18:23,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-12-09 05:18:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 05:18:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-12-09 05:18:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-09 05:18:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-12-09 05:18:23,850 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 28 [2020-12-09 05:18:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:23,850 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-12-09 05:18:23,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 05:18:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-12-09 05:18:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-09 05:18:23,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:18:23,851 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 05:18:24,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2020-12-09 05:18:24,053 INFO L429 AbstractCegarLoop]: === Iteration 17 === [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]=== [2020-12-09 05:18:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:18:24,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1496073855, now seen corresponding path program 2 times [2020-12-09 05:18:24,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:18:24,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648384689] [2020-12-09 05:18:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:18:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:18:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 149 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 05:18:24,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648384689] [2020-12-09 05:18:24,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783305240] [2020-12-09 05:18:24,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:18:24,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 05:18:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:18:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:18:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:18:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-09 05:18:24,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:18:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-09 05:18:24,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 05:18:24,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 13 [2020-12-09 05:18:24,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937540208] [2020-12-09 05:18:24,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:18:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:18:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:18:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-09 05:18:24,298 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2020-12-09 05:18:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:18:24,323 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-12-09 05:18:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:18:24,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-09 05:18:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:18:24,324 INFO L225 Difference]: With dead ends: 67 [2020-12-09 05:18:24,324 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:18:24,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-09 05:18:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:18:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:18:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:18:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:18:24,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-12-09 05:18:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:18:24,325 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:18:24,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:18:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:18:24,325 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:18:24,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2020-12-09 05:18:24,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:18:24 BoogieIcfgContainer [2020-12-09 05:18:24,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:18:24,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:18:24,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:18:24,539 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:18:24,540 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:18:05" (3/4) ... [2020-12-09 05:18:24,548 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:18:24,567 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 05:18:24,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 05:18:24,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 05:18:24,595 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e6a60cd8-0869-4f13-97ba-305a80c900fe/bin/utaipan/witness.graphml [2020-12-09 05:18:24,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:18:24,595 INFO L168 Benchmark]: Toolchain (without parser) took 19656.36 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 49.1 MB in the beginning and 92.2 MB in the end (delta: -43.1 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,596 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:18:24,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.02 ms. Allocated memory is still 88.1 MB. Free memory was 49.0 MB in the beginning and 64.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,596 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.79 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 62.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,596 INFO L168 Benchmark]: Boogie Preprocessor took 22.46 ms. Allocated memory is still 88.1 MB. Free memory was 62.6 MB in the beginning and 61.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:18:24,596 INFO L168 Benchmark]: RCFGBuilder took 299.34 ms. Allocated memory is still 88.1 MB. Free memory was 61.5 MB in the beginning and 55.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,597 INFO L168 Benchmark]: TraceAbstraction took 19082.15 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 55.1 MB in the beginning and 95.4 MB in the end (delta: -40.3 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,597 INFO L168 Benchmark]: Witness Printer took 56.04 ms. Allocated memory is still 157.3 MB. Free memory was 95.4 MB in the beginning and 92.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:18:24,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.02 ms. Allocated memory is still 88.1 MB. Free memory was 49.0 MB in the beginning and 64.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.79 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 62.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.46 ms. Allocated memory is still 88.1 MB. Free memory was 62.6 MB in the beginning and 61.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 299.34 ms. Allocated memory is still 88.1 MB. Free memory was 61.5 MB in the beginning and 55.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19082.15 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 55.1 MB in the beginning and 95.4 MB in the end (delta: -40.3 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * Witness Printer took 56.04 ms. Allocated memory is still 157.3 MB. Free memory was 95.4 MB in the beginning and 92.2 MB in the end (delta: 3.3 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: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: 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: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: 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: 19.0s, OverallIterations: 17, TraceHistogramMax: 9, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 577 SDslu, 287 SDs, 0 SdLazy, 861 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 655 GetRequests, 459 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, 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, 17 MinimizatonAttempts, 286 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 451 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 621 ConstructedInterpolants, 11 QuantifiedInterpolants, 147489 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/1181 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]: 888, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME[ms]: 421, 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: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 409, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 68, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 77, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 225, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 161, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 18, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME[ms]: 25, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 554, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 553, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, 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]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 139, DAG_COMPRESSION_RETAINED_NODES: 54, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...