./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_13.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_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_13.c -s /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/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 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 13:03:02,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:02,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:02,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:02,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:02,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:02,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:02,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:02,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:02,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:02,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:02,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:02,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:02,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:02,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:02,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:02,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:02,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:02,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:02,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:02,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:02,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:02,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:02,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:02,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:02,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:02,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:02,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:02,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:02,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:02,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:02,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:02,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:02,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:02,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:02,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:02,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:02,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:02,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:02,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:02,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:02,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:03:02,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:02,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:02,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:02,172 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:02,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:02,173 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:02,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:03:02,173 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:02,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:02,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:03:02,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:03:02,174 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:02,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:03:02,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:03:02,175 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:03:02,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:03:02,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:03:02,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:02,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:02,177 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:03:02,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:03:02,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:02,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:02,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:03:02,178 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:03:02,178 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:03:02,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:02,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:02,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:02,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:02,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:02,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:02,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:02,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:02,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:02,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:02,181 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:03:02,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:03:02,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:02,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:02,181 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_edeb843c-8a1e-45fb-a995-7eda74024da0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 [2020-11-22 13:03:02,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:02,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:02,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:02,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:02,440 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:02,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_13.c [2020-11-22 13:03:02,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/data/9acc66026/861151515d5740a68c6fd6836a2fa7fb/FLAG5f3590252 [2020-11-22 13:03:02,974 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:02,975 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/sv-benchmarks/c/locks/test_locks_13.c [2020-11-22 13:03:02,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/data/9acc66026/861151515d5740a68c6fd6836a2fa7fb/FLAG5f3590252 [2020-11-22 13:03:03,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/data/9acc66026/861151515d5740a68c6fd6836a2fa7fb [2020-11-22 13:03:03,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:03,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:03,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:03,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:03,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:03,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3786f1ea 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 13:03:03,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:03" (1/1) ... [2020-11-22 13:03:03,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:03,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:03,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:03,591 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:03,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:03,633 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:03,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:03 WrapperNode [2020-11-22 13:03:03,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:03,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:03,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:03,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:03,642 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 13:03:03,650 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 13:03:03,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:03,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:03,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:03,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:03,682 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 13:03:03,683 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 13:03:03,685 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 13:03:03,686 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 13:03:03,690 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 13:03:03,695 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 13:03:03,697 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 13:03:03,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:03,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:03,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:03,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:03,702 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_edeb843c-8a1e-45fb-a995-7eda74024da0/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 13:03:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:03,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:03:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:04,536 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:04,537 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:03:04,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:04 BoogieIcfgContainer [2020-11-22 13:03:04,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:04,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:04,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:04,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:04,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:03" (1/3) ... [2020-11-22 13:03:04,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be9a37 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 13:03:04,545 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 13:03:04,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be9a37 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 13:03:04,546 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 13:03:04,547 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-11-22 13:03:04,557 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:04,562 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:03:04,573 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:03:04,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:04,593 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:03:04,593 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:04,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:04,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:04,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:04,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:04,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-22 13:03:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:03:04,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:03:04,613 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash 8677861, now seen corresponding path program 1 times [2020-11-22 13:03:04,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290751114] [2020-11-22 13:03:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,747 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 13:03:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290751114] [2020-11-22 13:03:04,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381098473] [2020-11-22 13:03:04,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:03:04,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:03:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:03:04,769 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-11-22 13:03:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,782 INFO L93 Difference]: Finished difference Result 35 states and 60 transitions. [2020-11-22 13:03:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:03:04,784 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-22 13:03:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,792 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:03:04,792 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 13:03:04,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:03:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 13:03:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-22 13:03:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 13:03:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 59 transitions. [2020-11-22 13:03:04,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 59 transitions. Word has length 4 [2020-11-22 13:03:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,826 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 59 transitions. [2020-11-22 13:03:04,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:03:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 59 transitions. [2020-11-22 13:03:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:03:04,827 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:03:04,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:03:04,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 260781796, now seen corresponding path program 1 times [2020-11-22 13:03:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741413525] [2020-11-22 13:03:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,892 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 13:03:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741413525] [2020-11-22 13:03:04,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:03:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916743861] [2020-11-22 13:03:04,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:03:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:03:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:04,895 INFO L87 Difference]: Start difference. First operand 34 states and 59 transitions. Second operand 3 states. [2020-11-22 13:03:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,905 INFO L93 Difference]: Finished difference Result 33 states and 58 transitions. [2020-11-22 13:03:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:03:04,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:03:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,907 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:03:04,907 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 13:03:04,907 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 13:03:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 13:03:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-22 13:03:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2020-11-22 13:03:04,916 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 5 [2020-11-22 13:03:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,916 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2020-11-22 13:03:04,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:03:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2020-11-22 13:03:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:04,918 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:03:04,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -497947030, now seen corresponding path program 1 times [2020-11-22 13:03:04,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551122929] [2020-11-22 13:03:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,019 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 13:03:05,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551122929] [2020-11-22 13:03:05,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171471449] [2020-11-22 13:03:05,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,022 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand 4 states. [2020-11-22 13:03:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,054 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2020-11-22 13:03:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:03:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,058 INFO L225 Difference]: With dead ends: 59 [2020-11-22 13:03:05,058 INFO L226 Difference]: Without dead ends: 59 [2020-11-22 13:03:05,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-22 13:03:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-22 13:03:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 55 transitions. [2020-11-22 13:03:05,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 55 transitions. Word has length 6 [2020-11-22 13:03:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,068 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 55 transitions. [2020-11-22 13:03:05,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 55 transitions. [2020-11-22 13:03:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:03:05,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:03:05,069 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1743723630, now seen corresponding path program 1 times [2020-11-22 13:03:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264920309] [2020-11-22 13:03:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,151 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 13:03:05,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264920309] [2020-11-22 13:03:05,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443032392] [2020-11-22 13:03:05,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,153 INFO L87 Difference]: Start difference. First operand 31 states and 55 transitions. Second operand 4 states. [2020-11-22 13:03:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,177 INFO L93 Difference]: Finished difference Result 57 states and 101 transitions. [2020-11-22 13:03:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:03:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,179 INFO L225 Difference]: With dead ends: 57 [2020-11-22 13:03:05,179 INFO L226 Difference]: Without dead ends: 57 [2020-11-22 13:03:05,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-22 13:03:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2020-11-22 13:03:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2020-11-22 13:03:05,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 7 [2020-11-22 13:03:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,185 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2020-11-22 13:03:05,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2020-11-22 13:03:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:03:05,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:03:05,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1778929601, now seen corresponding path program 1 times [2020-11-22 13:03:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574794214] [2020-11-22 13:03:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,293 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 13:03:05,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574794214] [2020-11-22 13:03:05,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021492960] [2020-11-22 13:03:05,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,295 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand 4 states. [2020-11-22 13:03:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,327 INFO L93 Difference]: Finished difference Result 55 states and 96 transitions. [2020-11-22 13:03:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:03:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,329 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:03:05,329 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 13:03:05,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 13:03:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-11-22 13:03:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 53 transitions. [2020-11-22 13:03:05,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 53 transitions. Word has length 8 [2020-11-22 13:03:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,335 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 53 transitions. [2020-11-22 13:03:05,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 53 transitions. [2020-11-22 13:03:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:03:05,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:03:05,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 687970275, now seen corresponding path program 1 times [2020-11-22 13:03:05,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164961385] [2020-11-22 13:03:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,442 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 13:03:05,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164961385] [2020-11-22 13:03:05,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698489480] [2020-11-22 13:03:05,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,444 INFO L87 Difference]: Start difference. First operand 31 states and 53 transitions. Second operand 4 states. [2020-11-22 13:03:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,479 INFO L93 Difference]: Finished difference Result 53 states and 91 transitions. [2020-11-22 13:03:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:03:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,483 INFO L225 Difference]: With dead ends: 53 [2020-11-22 13:03:05,484 INFO L226 Difference]: Without dead ends: 53 [2020-11-22 13:03:05,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-22 13:03:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2020-11-22 13:03:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 52 transitions. [2020-11-22 13:03:05,492 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 52 transitions. Word has length 9 [2020-11-22 13:03:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,493 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 52 transitions. [2020-11-22 13:03:05,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 52 transitions. [2020-11-22 13:03:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:03:05,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:03:05,499 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash -147544556, now seen corresponding path program 1 times [2020-11-22 13:03:05,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441799666] [2020-11-22 13:03:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,570 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 13:03:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441799666] [2020-11-22 13:03:05,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498576698] [2020-11-22 13:03:05,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,572 INFO L87 Difference]: Start difference. First operand 31 states and 52 transitions. Second operand 4 states. [2020-11-22 13:03:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,601 INFO L93 Difference]: Finished difference Result 51 states and 86 transitions. [2020-11-22 13:03:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:03:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,603 INFO L225 Difference]: With dead ends: 51 [2020-11-22 13:03:05,603 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:03:05,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:03:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2020-11-22 13:03:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-11-22 13:03:05,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 10 [2020-11-22 13:03:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,608 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-11-22 13:03:05,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-11-22 13:03:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:05,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:03:05,612 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -278700200, now seen corresponding path program 1 times [2020-11-22 13:03:05,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637055395] [2020-11-22 13:03:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,670 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 13:03:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637055395] [2020-11-22 13:03:05,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182792823] [2020-11-22 13:03:05,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,672 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-11-22 13:03:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,691 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-11-22 13:03:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:03:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,693 INFO L225 Difference]: With dead ends: 49 [2020-11-22 13:03:05,693 INFO L226 Difference]: Without dead ends: 49 [2020-11-22 13:03:05,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-22 13:03:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-11-22 13:03:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2020-11-22 13:03:05,697 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 11 [2020-11-22 13:03:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,698 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2020-11-22 13:03:05,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2020-11-22 13:03:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:03:05,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:03:05,699 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -49557527, now seen corresponding path program 1 times [2020-11-22 13:03:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257273804] [2020-11-22 13:03:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,758 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 13:03:05,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257273804] [2020-11-22 13:03:05,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592962295] [2020-11-22 13:03:05,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,760 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2020-11-22 13:03:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,794 INFO L93 Difference]: Finished difference Result 47 states and 76 transitions. [2020-11-22 13:03:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:03:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,796 INFO L225 Difference]: With dead ends: 47 [2020-11-22 13:03:05,796 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 13:03:05,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 13:03:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2020-11-22 13:03:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 49 transitions. [2020-11-22 13:03:05,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 49 transitions. Word has length 12 [2020-11-22 13:03:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,800 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 49 transitions. [2020-11-22 13:03:05,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 49 transitions. [2020-11-22 13:03:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:03:05,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:03:05,801 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1536068915, now seen corresponding path program 1 times [2020-11-22 13:03:05,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911308031] [2020-11-22 13:03:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,834 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 13:03:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911308031] [2020-11-22 13:03:05,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214882811] [2020-11-22 13:03:05,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,836 INFO L87 Difference]: Start difference. First operand 31 states and 49 transitions. Second operand 4 states. [2020-11-22 13:03:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,852 INFO L93 Difference]: Finished difference Result 45 states and 71 transitions. [2020-11-22 13:03:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 13:03:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,854 INFO L225 Difference]: With dead ends: 45 [2020-11-22 13:03:05,854 INFO L226 Difference]: Without dead ends: 45 [2020-11-22 13:03:05,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-22 13:03:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-11-22 13:03:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2020-11-22 13:03:05,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 13 [2020-11-22 13:03:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,857 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 48 transitions. [2020-11-22 13:03:05,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2020-11-22 13:03:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:03:05,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:03:05,858 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -373281346, now seen corresponding path program 1 times [2020-11-22 13:03:05,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541187083] [2020-11-22 13:03:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541187083] [2020-11-22 13:03:05,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413723937] [2020-11-22 13:03:05,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,906 INFO L87 Difference]: Start difference. First operand 31 states and 48 transitions. Second operand 4 states. [2020-11-22 13:03:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,929 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2020-11-22 13:03:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:03:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,930 INFO L225 Difference]: With dead ends: 43 [2020-11-22 13:03:05,930 INFO L226 Difference]: Without dead ends: 43 [2020-11-22 13:03:05,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-22 13:03:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-11-22 13:03:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2020-11-22 13:03:05,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 14 [2020-11-22 13:03:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 47 transitions. [2020-11-22 13:03:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 47 transitions. [2020-11-22 13:03:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:03:05,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:03:05,934 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1313395266, now seen corresponding path program 1 times [2020-11-22 13:03:05,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917497639] [2020-11-22 13:03:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,973 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 13:03:05,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917497639] [2020-11-22 13:03:05,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198804551] [2020-11-22 13:03:05,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,975 INFO L87 Difference]: Start difference. First operand 31 states and 47 transitions. Second operand 4 states. [2020-11-22 13:03:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,992 INFO L93 Difference]: Finished difference Result 41 states and 61 transitions. [2020-11-22 13:03:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-22 13:03:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,993 INFO L225 Difference]: With dead ends: 41 [2020-11-22 13:03:05,994 INFO L226 Difference]: Without dead ends: 41 [2020-11-22 13:03:05,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-22 13:03:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-11-22 13:03:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 46 transitions. [2020-11-22 13:03:05,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 46 transitions. Word has length 15 [2020-11-22 13:03:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,996 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 46 transitions. [2020-11-22 13:03:05,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 46 transitions. [2020-11-22 13:03:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:03:05,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:03:05,998 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2060763027, now seen corresponding path program 1 times [2020-11-22 13:03:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296676949] [2020-11-22 13:03:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,036 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 13:03:06,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296676949] [2020-11-22 13:03:06,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:06,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:06,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904484583] [2020-11-22 13:03:06,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:06,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:06,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:06,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:06,038 INFO L87 Difference]: Start difference. First operand 31 states and 46 transitions. Second operand 4 states. [2020-11-22 13:03:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,068 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-11-22 13:03:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:06,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-22 13:03:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,069 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:03:06,069 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:03:06,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:03:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-11-22 13:03:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-11-22 13:03:06,072 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 16 [2020-11-22 13:03:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,072 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-11-22 13:03:06,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-11-22 13:03:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 13:03:06,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:06,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:06,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:03:06,073 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash -540639817, now seen corresponding path program 1 times [2020-11-22 13:03:06,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:06,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983388000] [2020-11-22 13:03:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,115 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 13:03:06,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983388000] [2020-11-22 13:03:06,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:06,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:06,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615981167] [2020-11-22 13:03:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:06,117 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 4 states. [2020-11-22 13:03:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,142 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-11-22 13:03:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:06,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 13:03:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,143 INFO L225 Difference]: With dead ends: 37 [2020-11-22 13:03:06,143 INFO L226 Difference]: Without dead ends: 37 [2020-11-22 13:03:06,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-22 13:03:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-11-22 13:03:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:03:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2020-11-22 13:03:06,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 17 [2020-11-22 13:03:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,146 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2020-11-22 13:03:06,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2020-11-22 13:03:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:03:06,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:06,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:06,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-22 13:03:06,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 420250984, now seen corresponding path program 1 times [2020-11-22 13:03:06,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:06,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667493307] [2020-11-22 13:03:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667493307] [2020-11-22 13:03:06,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:06,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:06,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386588007] [2020-11-22 13:03:06,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:06,195 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand 4 states. [2020-11-22 13:03:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:06,214 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2020-11-22 13:03:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:06,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-22 13:03:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:06,214 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:03:06,215 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:03:06,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 13:03:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:03:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:03:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:03:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:03:06,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-22 13:03:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:06,216 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:03:06,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:03:06,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:03:06,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-22 13:03:06,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:06 BoogieIcfgContainer [2020-11-22 13:03:06,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:06,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:06,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:06,221 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:06,221 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 13:03:06,224 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:03:06,240 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-22 13:03:06,241 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-22 13:03:06,241 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 13:03:06,242 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:03:06,330 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_edeb843c-8a1e-45fb-a995-7eda74024da0/bin/utaipan/witness.graphml [2020-11-22 13:03:06,331 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:06,335 INFO L168 Benchmark]: Toolchain (without parser) took 3004.37 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 69.7 MB in the beginning and 51.3 MB in the end (delta: 18.5 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,336 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 77.6 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:06,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 100.7 MB. Free memory was 69.5 MB in the beginning and 77.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,337 INFO L168 Benchmark]: Boogie Preprocessor took 26.39 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,337 INFO L168 Benchmark]: RCFGBuilder took 838.01 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 75.0 MB in the end (delta: -999.1 kB). Peak memory consumption was 46.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,338 INFO L168 Benchmark]: TraceAbstraction took 1679.90 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 74.8 MB in the beginning and 56.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,338 INFO L168 Benchmark]: Witness Printer took 110.06 ms. Allocated memory is still 121.6 MB. Free memory was 56.7 MB in the beginning and 51.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:06,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 77.6 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 100.7 MB. Free memory was 69.5 MB in the beginning and 77.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.39 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 838.01 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 75.0 MB in the end (delta: -999.1 kB). Peak memory consumption was 46.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1679.90 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 74.8 MB in the beginning and 56.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. * Witness Printer took 110.06 ms. Allocated memory is still 121.6 MB. Free memory was 56.7 MB in the beginning and 51.3 MB in the end (delta: 5.4 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: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 728 SDtfs, 573 SDslu, 908 SDs, 0 SdLazy, 117 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, 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, 15 MinimizatonAttempts, 204 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 9196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 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...