./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/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 b909735efeb9bc00b7df4035956af92a753b9076 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:03:02,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:02,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:02,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:02,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:02,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:02,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:02,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:02,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:02,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:02,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:02,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:02,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:02,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:02,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:02,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:02,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:02,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:02,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:02,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:02,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:02,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:02,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:02,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:02,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:02,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:02,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:02,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:02,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:02,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:02,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:02,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:02,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:02,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:02,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:02,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:02,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:02,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:02,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:02,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:02,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:02,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:03:02,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:02,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:02,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:02,267 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:02,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:02,267 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:02,268 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:03:02,268 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:02,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:02,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:03:02,269 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:03:02,270 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:02,270 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:03:02,270 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:03:02,270 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:03:02,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:03:02,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:03:02,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:02,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:02,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:03:02,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:03:02,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:02,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:02,273 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:03:02,273 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:03:02,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:03:02,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:02,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:02,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:02,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:02,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:02,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:02,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:02,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:02,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:02,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:02,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:03:02,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:03:02,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:02,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:02,281 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_aa3ba076-5bdd-4d88-93a2-d7634c335c36/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b909735efeb9bc00b7df4035956af92a753b9076 [2020-11-22 13:03:02,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:02,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:02,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:02,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:02,594 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:02,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/../../sv-benchmarks/c/verifythis/elimination_max.c [2020-11-22 13:03:02,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/data/e58b02221/583de8b84ada44b2be7740f06ee72406/FLAG17e4e82ec [2020-11-22 13:03:03,144 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:03,144 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/sv-benchmarks/c/verifythis/elimination_max.c [2020-11-22 13:03:03,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/data/e58b02221/583de8b84ada44b2be7740f06ee72406/FLAG17e4e82ec [2020-11-22 13:03:03,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/data/e58b02221/583de8b84ada44b2be7740f06ee72406 [2020-11-22 13:03:03,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:03,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:03,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:03,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:03,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:03,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1f8231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03, skipping insertion in model container [2020-11-22 13:03:03,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:03,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:03,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:03,798 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:03,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:03,834 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:03,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03 WrapperNode [2020-11-22 13:03:03,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:03,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:03,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:03,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:03,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:03,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:03,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:03,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:03,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:03,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:03,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:03,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:03,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:03:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:03:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:03:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:03:04,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:04,655 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-22 13:03:04,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:04 BoogieIcfgContainer [2020-11-22 13:03:04,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:04,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:04,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:04,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:04,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:03" (1/3) ... [2020-11-22 13:03:04,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9acfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:04, skipping insertion in model container [2020-11-22 13:03:04,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03" (2/3) ... [2020-11-22 13:03:04,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9acfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:04, skipping insertion in model container [2020-11-22 13:03:04,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:04" (3/3) ... [2020-11-22 13:03:04,665 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2020-11-22 13:03:04,692 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:04,696 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-11-22 13:03:04,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-11-22 13:03:04,730 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:04,730 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:03:04,730 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:04,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:04,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:04,731 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:04,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:04,731 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-22 13:03:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:03:04,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:03:04,753 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,759 INFO L82 PathProgramCache]: Analyzing trace with hash 147728, now seen corresponding path program 1 times [2020-11-22 13:03:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067665662] [2020-11-22 13:03:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067665662] [2020-11-22 13:03:05,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:03:05,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846829761] [2020-11-22 13:03:05,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:03:05,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:03:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:05,044 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-22 13:03:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,113 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-22 13:03:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:03:05,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:03:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,124 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:03:05,124 INFO L226 Difference]: Without dead ends: 30 [2020-11-22 13:03:05,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-22 13:03:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-22 13:03:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 13:03:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-22 13:03:05,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 3 [2020-11-22 13:03:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,177 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-22 13:03:05,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:03:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-22 13:03:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:03:05,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:03:05,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:03:05,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 147729, now seen corresponding path program 1 times [2020-11-22 13:03:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735587319] [2020-11-22 13:03:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735587319] [2020-11-22 13:03:05,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:05,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264358550] [2020-11-22 13:03:05,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,309 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 4 states. [2020-11-22 13:03:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,405 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-22 13:03:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-22 13:03:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,407 INFO L225 Difference]: With dead ends: 30 [2020-11-22 13:03:05,407 INFO L226 Difference]: Without dead ends: 30 [2020-11-22 13:03:05,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-22 13:03:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-22 13:03:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 13:03:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-22 13:03:05,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 3 [2020-11-22 13:03:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,413 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-22 13:03:05,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-22 13:03:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:03:05,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:03:05,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:03:05,414 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,415 INFO L82 PathProgramCache]: Analyzing trace with hash 144793, now seen corresponding path program 1 times [2020-11-22 13:03:05,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70690385] [2020-11-22 13:03:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70690385] [2020-11-22 13:03:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046519074] [2020-11-22 13:03:05,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,504 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 4 states. [2020-11-22 13:03:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,634 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-11-22 13:03:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-22 13:03:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,637 INFO L225 Difference]: With dead ends: 58 [2020-11-22 13:03:05,637 INFO L226 Difference]: Without dead ends: 58 [2020-11-22 13:03:05,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-22 13:03:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2020-11-22 13:03:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-22 13:03:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-22 13:03:05,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 3 [2020-11-22 13:03:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,643 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-22 13:03:05,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-22 13:03:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:03:05,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:03:05,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:03:05,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 4579585, now seen corresponding path program 1 times [2020-11-22 13:03:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892315375] [2020-11-22 13:03:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892315375] [2020-11-22 13:03:05,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024847369] [2020-11-22 13:03:05,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,767 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-11-22 13:03:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,845 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-11-22 13:03:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:03:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,847 INFO L225 Difference]: With dead ends: 56 [2020-11-22 13:03:05,847 INFO L226 Difference]: Without dead ends: 56 [2020-11-22 13:03:05,848 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 [2020-11-22 13:03:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-22 13:03:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-11-22 13:03:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-22 13:03:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-11-22 13:03:05,854 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 4 [2020-11-22 13:03:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,854 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-11-22 13:03:05,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-11-22 13:03:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:03:05,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:03:05,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:03:05,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 4488547, now seen corresponding path program 1 times [2020-11-22 13:03:05,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465339883] [2020-11-22 13:03:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465339883] [2020-11-22 13:03:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46266956] [2020-11-22 13:03:05,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,947 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-11-22 13:03:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,057 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-11-22 13:03:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:06,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:03:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,059 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:03:06,059 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 13:03:06,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 13:03:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-11-22 13:03:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-22 13:03:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-11-22 13:03:06,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 4 [2020-11-22 13:03:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,065 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-11-22 13:03:06,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-11-22 13:03:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:06,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:06,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:03:06,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:03:06,067 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:06,067 INFO L82 PathProgramCache]: Analyzing trace with hash 106068409, now seen corresponding path program 1 times [2020-11-22 13:03:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:06,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352468282] [2020-11-22 13:03:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:06,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352468282] [2020-11-22 13:03:06,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:06,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544776435] [2020-11-22 13:03:06,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:06,152 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 5 states. [2020-11-22 13:03:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,299 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-11-22 13:03:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:03:06,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 13:03:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,301 INFO L225 Difference]: With dead ends: 53 [2020-11-22 13:03:06,301 INFO L226 Difference]: Without dead ends: 53 [2020-11-22 13:03:06,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:03:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-22 13:03:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-11-22 13:03:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-22 13:03:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-11-22 13:03:06,312 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 6 [2020-11-22 13:03:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,313 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-11-22 13:03:06,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-11-22 13:03:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:06,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:06,314 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-22 13:03:06,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:03:06,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 18613504, now seen corresponding path program 1 times [2020-11-22 13:03:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:06,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320723935] [2020-11-22 13:03:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:06,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320723935] [2020-11-22 13:03:06,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159348890] [2020-11-22 13:03:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 13:03:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:06,633 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-22 13:03:06,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:03:06,635 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 4, 1] term [2020-11-22 13:03:06,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:03:06,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:03:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:06,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:06,792 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 13:03:06,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:06,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:06,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 2, 4, 1] term [2020-11-22 13:03:06,799 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:06,814 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:06,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:06,871 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2020-11-22 13:03:06,873 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:06,880 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2020-11-22 13:03:06,882 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:06,953 INFO L625 ElimStorePlain]: treesize reduction 42, result has 48.1 percent of original size [2020-11-22 13:03:06,958 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2020-11-22 13:03:06,959 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:06,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:03:06,975 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-22 13:03:06,975 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:104, output treesize:16 [2020-11-22 13:03:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:06,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:03:06,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-11-22 13:03:06,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834270634] [2020-11-22 13:03:06,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:06,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:03:06,997 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2020-11-22 13:03:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:07,225 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-11-22 13:03:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:03:07,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 13:03:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:07,226 INFO L225 Difference]: With dead ends: 52 [2020-11-22 13:03:07,226 INFO L226 Difference]: Without dead ends: 52 [2020-11-22 13:03:07,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:03:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-22 13:03:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-11-22 13:03:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-22 13:03:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-22 13:03:07,232 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2020-11-22 13:03:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:07,232 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-22 13:03:07,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-22 13:03:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:03:07,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:07,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:07,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-22 13:03:07,434 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash 577109626, now seen corresponding path program 1 times [2020-11-22 13:03:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:07,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365172198] [2020-11-22 13:03:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:07,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365172198] [2020-11-22 13:03:07,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693813933] [2020-11-22 13:03:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 13:03:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:07,674 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 4, 1] term [2020-11-22 13:03:07,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-22 13:03:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:07,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:07,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:07,763 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 4, 1] term [2020-11-22 13:03:07,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:07,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:07,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:07,787 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2020-11-22 13:03:07,789 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:07,799 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2020-11-22 13:03:07,800 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:07,835 INFO L625 ElimStorePlain]: treesize reduction 22, result has 62.7 percent of original size [2020-11-22 13:03:07,843 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2020-11-22 13:03:07,844 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:07,858 INFO L625 ElimStorePlain]: treesize reduction 8, result has 68.0 percent of original size [2020-11-22 13:03:07,858 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-22 13:03:07,859 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:84, output treesize:17 [2020-11-22 13:03:07,879 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:07,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:03:07,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 9 [2020-11-22 13:03:07,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462971924] [2020-11-22 13:03:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:03:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:03:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:03:07,899 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 8 states. [2020-11-22 13:03:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:08,131 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-11-22 13:03:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:03:08,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-11-22 13:03:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:08,132 INFO L225 Difference]: With dead ends: 50 [2020-11-22 13:03:08,132 INFO L226 Difference]: Without dead ends: 50 [2020-11-22 13:03:08,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:03:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-22 13:03:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2020-11-22 13:03:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-22 13:03:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-22 13:03:08,136 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 7 [2020-11-22 13:03:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:08,136 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-22 13:03:08,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:03:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-22 13:03:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:03:08,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:08,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2020-11-22 13:03:08,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:08,348 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash 577018588, now seen corresponding path program 1 times [2020-11-22 13:03:08,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:08,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844327823] [2020-11-22 13:03:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844327823] [2020-11-22 13:03:08,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062940673] [2020-11-22 13:03:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:03:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:08,512 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-22 13:03:08,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:03:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:03:08,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [3] total 10 [2020-11-22 13:03:08,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430667400] [2020-11-22 13:03:08,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:03:08,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:03:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:03:08,670 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-11-22 13:03:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:08,812 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-11-22 13:03:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:03:08,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-11-22 13:03:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:08,813 INFO L225 Difference]: With dead ends: 49 [2020-11-22 13:03:08,813 INFO L226 Difference]: Without dead ends: 49 [2020-11-22 13:03:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-22 13:03:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-22 13:03:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2020-11-22 13:03:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 13:03:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-22 13:03:08,817 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 7 [2020-11-22 13:03:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:08,817 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-22 13:03:08,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:03:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-22 13:03:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:03:08,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:08,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:09,018 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash 551623922, now seen corresponding path program 1 times [2020-11-22 13:03:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533311729] [2020-11-22 13:03:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:03:09,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533311729] [2020-11-22 13:03:09,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:09,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517425960] [2020-11-22 13:03:09,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:09,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:09,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:09,094 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-11-22 13:03:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,154 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-22 13:03:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:03:09,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-22 13:03:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,155 INFO L225 Difference]: With dead ends: 28 [2020-11-22 13:03:09,155 INFO L226 Difference]: Without dead ends: 28 [2020-11-22 13:03:09,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:03:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-22 13:03:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-11-22 13:03:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-22 13:03:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-22 13:03:09,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2020-11-22 13:03:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,158 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-22 13:03:09,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-22 13:03:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:09,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:03:09,159 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 540553615, now seen corresponding path program 1 times [2020-11-22 13:03:09,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842967064] [2020-11-22 13:03:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:09,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842967064] [2020-11-22 13:03:09,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:09,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901894399] [2020-11-22 13:03:09,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:09,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:09,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:09,247 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-11-22 13:03:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,345 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-11-22 13:03:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:03:09,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-22 13:03:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,346 INFO L225 Difference]: With dead ends: 45 [2020-11-22 13:03:09,346 INFO L226 Difference]: Without dead ends: 45 [2020-11-22 13:03:09,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:03:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-22 13:03:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-11-22 13:03:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-22 13:03:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-22 13:03:09,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 11 [2020-11-22 13:03:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,350 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-22 13:03:09,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-22 13:03:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:03:09,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:03:09,351 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash -218813851, now seen corresponding path program 1 times [2020-11-22 13:03:09,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637824674] [2020-11-22 13:03:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637824674] [2020-11-22 13:03:09,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:03:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660026705] [2020-11-22 13:03:09,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:03:09,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:03:09,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:03:09,427 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-11-22 13:03:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,522 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-22 13:03:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:03:09,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-22 13:03:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,523 INFO L225 Difference]: With dead ends: 43 [2020-11-22 13:03:09,523 INFO L226 Difference]: Without dead ends: 43 [2020-11-22 13:03:09,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:03:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-22 13:03:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-11-22 13:03:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:03:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-22 13:03:09,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 13 [2020-11-22 13:03:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,527 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-22 13:03:09,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:03:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-22 13:03:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:03:09,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:03:09,528 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1806748271, now seen corresponding path program 1 times [2020-11-22 13:03:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780825273] [2020-11-22 13:03:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:03:09,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780825273] [2020-11-22 13:03:09,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:03:09,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885752404] [2020-11-22 13:03:09,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:03:09,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:03:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:09,581 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 3 states. [2020-11-22 13:03:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,600 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-22 13:03:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:03:09,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-22 13:03:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,601 INFO L225 Difference]: With dead ends: 34 [2020-11-22 13:03:09,601 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 13:03:09,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 13:03:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-22 13:03:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 13:03:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-22 13:03:09,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 14 [2020-11-22 13:03:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,604 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-22 13:03:09,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:03:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-22 13:03:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:03:09,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:03:09,608 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -174347786, now seen corresponding path program 1 times [2020-11-22 13:03:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819506848] [2020-11-22 13:03:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:03:09,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819506848] [2020-11-22 13:03:09,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:09,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261761254] [2020-11-22 13:03:09,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:09,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:09,700 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-11-22 13:03:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,763 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-22 13:03:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:03:09,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-22 13:03:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,764 INFO L225 Difference]: With dead ends: 32 [2020-11-22 13:03:09,764 INFO L226 Difference]: Without dead ends: 32 [2020-11-22 13:03:09,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:03:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-22 13:03:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-22 13:03:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-22 13:03:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-22 13:03:09,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 14 [2020-11-22 13:03:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,767 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-22 13:03:09,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-22 13:03:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:03:09,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-22 13:03:09,768 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1118304914, now seen corresponding path program 1 times [2020-11-22 13:03:09,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584767753] [2020-11-22 13:03:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:03:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584767753] [2020-11-22 13:03:09,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:09,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178415501] [2020-11-22 13:03:09,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:09,853 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-11-22 13:03:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,886 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-22 13:03:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:09,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-22 13:03:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,887 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:03:09,887 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 13:03:09,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 13:03:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 13:03:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:03:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-22 13:03:09,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-11-22 13:03:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,889 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-22 13:03:09,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-22 13:03:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:03:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-22 13:03:09,890 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -44292852, now seen corresponding path program 1 times [2020-11-22 13:03:09,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968158389] [2020-11-22 13:03:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:09,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968158389] [2020-11-22 13:03:09,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733303672] [2020-11-22 13:03:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 13:03:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:10,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:10,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:10,223 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2020-11-22 13:03:10,224 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:10,229 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2020-11-22 13:03:10,230 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:10,234 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:03:10,234 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-22 13:03:10,234 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:11 [2020-11-22 13:03:10,254 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:03:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:10,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931428921] [2020-11-22 13:03:10,300 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-22 13:03:10,300 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:03:10,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:03:10,315 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:03:10,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:03:10,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:03:10,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:03:11,462 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:03:11,764 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-11-22 13:03:12,017 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-11-22 13:03:12,384 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-11-22 13:03:12,712 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-11-22 13:03:13,094 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-11-22 13:03:13,676 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-11-22 13:03:14,237 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-11-22 13:03:14,414 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:03:14,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:03:14,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2020-11-22 13:03:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309238149] [2020-11-22 13:03:14,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-22 13:03:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-22 13:03:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-11-22 13:03:14,416 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2020-11-22 13:03:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:14,659 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-22 13:03:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:03:14,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-11-22 13:03:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:14,660 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:03:14,660 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 13:03:14,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2020-11-22 13:03:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 13:03:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-11-22 13:03:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:03:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-22 13:03:14,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-11-22 13:03:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:14,664 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-22 13:03:14,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-22 13:03:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-22 13:03:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:03:14,665 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:14,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:14,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:14,880 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:03:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 913494838, now seen corresponding path program 2 times [2020-11-22 13:03:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:14,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237155383] [2020-11-22 13:03:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237155383] [2020-11-22 13:03:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405402884] [2020-11-22 13:03:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:15,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-22 13:03:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:03:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:03:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:15,226 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-22 13:03:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 13:03:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 13:03:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143276145] [2020-11-22 13:03:15,583 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-22 13:03:15,583 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:03:15,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:03:15,583 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:03:15,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:03:15,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:03:15,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:03:16,316 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:03:16,593 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-11-22 13:03:16,809 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-11-22 13:03:17,069 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-11-22 13:03:17,346 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-11-22 13:03:17,626 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-11-22 13:03:18,175 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-11-22 13:03:18,723 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-11-22 13:03:18,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:03:18,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:03:18,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-11-22 13:03:18,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772342584] [2020-11-22 13:03:18,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-22 13:03:18,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-22 13:03:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:03:18,869 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-11-22 13:03:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:19,137 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-22 13:03:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:03:19,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-11-22 13:03:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:19,138 INFO L225 Difference]: With dead ends: 26 [2020-11-22 13:03:19,138 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:03:19,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2020-11-22 13:03:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:03:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:03:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:03:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:03:19,140 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-22 13:03:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:19,140 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:03:19,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-22 13:03:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:03:19,140 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:03:19,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:19,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:19 BoogieIcfgContainer [2020-11-22 13:03:19,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:19,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:19,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:19,345 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:19,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:04" (3/4) ... [2020-11-22 13:03:19,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:03:19,358 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-22 13:03:19,358 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-22 13:03:19,359 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:03:19,359 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:03:19,399 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_aa3ba076-5bdd-4d88-93a2-d7634c335c36/bin/utaipan/witness.graphml [2020-11-22 13:03:19,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:19,404 INFO L168 Benchmark]: Toolchain (without parser) took 15850.28 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 61.7 MB in the beginning and 197.3 MB in the end (delta: -135.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,404 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 53.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:19,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.41 ms. Allocated memory is still 94.4 MB. Free memory was 61.7 MB in the beginning and 70.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.18 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,405 INFO L168 Benchmark]: Boogie Preprocessor took 25.80 ms. Allocated memory is still 94.4 MB. Free memory was 69.1 MB in the beginning and 67.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,406 INFO L168 Benchmark]: RCFGBuilder took 755.53 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 35.9 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,406 INFO L168 Benchmark]: TraceAbstraction took 14686.21 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 35.5 MB in the beginning and 200.6 MB in the end (delta: -165.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:19,407 INFO L168 Benchmark]: Witness Printer took 57.98 ms. Allocated memory is still 237.0 MB. Free memory was 200.6 MB in the beginning and 197.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:19,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 53.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.41 ms. Allocated memory is still 94.4 MB. Free memory was 61.7 MB in the beginning and 70.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.18 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.80 ms. Allocated memory is still 94.4 MB. Free memory was 69.1 MB in the beginning and 67.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 755.53 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 35.9 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14686.21 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 35.5 MB in the beginning and 200.6 MB in the end (delta: -165.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 57.98 ms. Allocated memory is still 237.0 MB. Free memory was 200.6 MB in the beginning and 197.3 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: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.6s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 615 SDslu, 313 SDs, 0 SdLazy, 862 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 230 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, 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, 130 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 214 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 41091 SizeOfPredicates, 49 NumberOfNonLiveVariables, 509 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 27 InterpolantComputations, 17 PerfectInterpolantSequences, 35/63 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...