./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_9.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_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:01:08,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:08,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:08,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:08,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:08,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:08,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:08,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:08,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:08,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:08,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:08,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:08,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:08,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:08,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:08,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:08,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:08,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:08,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:08,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:08,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:08,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:08,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:08,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:08,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:08,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:08,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:08,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:08,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:08,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:08,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:08,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:08,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:08,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:08,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:08,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:08,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:08,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:08,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:08,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:08,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:08,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:01:09,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:09,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:09,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:09,033 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:09,033 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:09,033 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:09,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:09,034 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:09,034 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:09,034 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:09,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:09,036 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:09,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:09,037 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:09,037 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:09,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:01:09,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:01:09,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:09,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:09,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:01:09,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:09,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:09,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:09,040 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:01:09,040 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:01:09,040 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:01:09,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:09,042 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:09,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:09,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:09,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:09,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:09,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:09,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:09,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:09,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:09,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:09,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:09,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:09,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:09,046 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_65deac7c-66ec-4345-a3cc-108e97e8745a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2020-11-22 13:01:09,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:09,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:09,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:09,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:09,348 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:09,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_9.c [2020-11-22 13:01:09,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/data/eb9fc858d/c9a532726ed94a2a98c9875d04cd0695/FLAG8b2c20096 [2020-11-22 13:01:09,831 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:09,831 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/sv-benchmarks/c/locks/test_locks_9.c [2020-11-22 13:01:09,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/data/eb9fc858d/c9a532726ed94a2a98c9875d04cd0695/FLAG8b2c20096 [2020-11-22 13:01:10,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/data/eb9fc858d/c9a532726ed94a2a98c9875d04cd0695 [2020-11-22 13:01:10,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:10,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:10,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:10,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:10,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:10,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@257a953d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10, skipping insertion in model container [2020-11-22 13:01:10,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:10,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:10,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:10,493 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:10,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:10,544 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:10,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10 WrapperNode [2020-11-22 13:01:10,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:10,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:10,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:10,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:10,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:10,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:10,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:10,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:10,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... [2020-11-22 13:01:10,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:10,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:10,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:10,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:10,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/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 13:01:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:10,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:11,417 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:11,417 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:01:11,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:11 BoogieIcfgContainer [2020-11-22 13:01:11,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:11,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:11,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:11,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:11,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:10" (1/3) ... [2020-11-22 13:01:11,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3525abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:11, skipping insertion in model container [2020-11-22 13:01:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:10" (2/3) ... [2020-11-22 13:01:11,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3525abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:11, skipping insertion in model container [2020-11-22 13:01:11,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:11" (3/3) ... [2020-11-22 13:01:11,428 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-11-22 13:01:11,450 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:11,454 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:01:11,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:01:11,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:11,504 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:01:11,505 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:11,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:11,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:11,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:11,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:11,506 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-11-22 13:01:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:01:11,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:11,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:01:11,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash 6567251, now seen corresponding path program 1 times [2020-11-22 13:01:11,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:11,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474522458] [2020-11-22 13:01:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:11,712 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 13:01:11,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474522458] [2020-11-22 13:01:11,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:11,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:11,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777025487] [2020-11-22 13:01:11,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:01:11,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:01:11,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:11,741 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-11-22 13:01:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:11,759 INFO L93 Difference]: Finished difference Result 27 states and 44 transitions. [2020-11-22 13:01:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:01:11,760 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-22 13:01:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:11,770 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:01:11,770 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 13:01:11,773 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 13:01:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 13:01:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-22 13:01:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 13:01:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 43 transitions. [2020-11-22 13:01:11,816 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 43 transitions. Word has length 4 [2020-11-22 13:01:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:11,817 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 43 transitions. [2020-11-22 13:01:11,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:01:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 43 transitions. [2020-11-22 13:01:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:11,818 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:11,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:11,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:11,819 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash 197980192, now seen corresponding path program 1 times [2020-11-22 13:01:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:11,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188494294] [2020-11-22 13:01:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:11,908 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 13:01:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188494294] [2020-11-22 13:01:11,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:11,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:01:11,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696645675] [2020-11-22 13:01:11,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:11,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:11,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:11,911 INFO L87 Difference]: Start difference. First operand 26 states and 43 transitions. Second operand 3 states. [2020-11-22 13:01:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:11,917 INFO L93 Difference]: Finished difference Result 25 states and 42 transitions. [2020-11-22 13:01:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:11,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:01:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:11,918 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:01:11,918 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:01:11,919 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 13:01:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:01:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 13:01:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 40 transitions. [2020-11-22 13:01:11,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 40 transitions. Word has length 5 [2020-11-22 13:01:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:11,924 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 40 transitions. [2020-11-22 13:01:11,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 40 transitions. [2020-11-22 13:01:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:01:11,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:11,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:01:11,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:01:11,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1847979797, now seen corresponding path program 1 times [2020-11-22 13:01:11,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:11,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738916944] [2020-11-22 13:01:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:11,987 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 13:01:11,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738916944] [2020-11-22 13:01:11,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:11,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:11,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183891007] [2020-11-22 13:01:11,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:11,989 INFO L87 Difference]: Start difference. First operand 23 states and 40 transitions. Second operand 4 states. [2020-11-22 13:01:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,019 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2020-11-22 13:01:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:01:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,023 INFO L225 Difference]: With dead ends: 43 [2020-11-22 13:01:12,023 INFO L226 Difference]: Without dead ends: 43 [2020-11-22 13:01:12,024 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 13:01:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-22 13:01:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2020-11-22 13:01:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 39 transitions. [2020-11-22 13:01:12,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 39 transitions. Word has length 6 [2020-11-22 13:01:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,031 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 39 transitions. [2020-11-22 13:01:12,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 39 transitions. [2020-11-22 13:01:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:01:12,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:01:12,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1453012531, now seen corresponding path program 1 times [2020-11-22 13:01:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219999225] [2020-11-22 13:01:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,086 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 13:01:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219999225] [2020-11-22 13:01:12,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155551836] [2020-11-22 13:01:12,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,089 INFO L87 Difference]: Start difference. First operand 23 states and 39 transitions. Second operand 4 states. [2020-11-22 13:01:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,111 INFO L93 Difference]: Finished difference Result 41 states and 69 transitions. [2020-11-22 13:01:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:01:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,112 INFO L225 Difference]: With dead ends: 41 [2020-11-22 13:01:12,112 INFO L226 Difference]: Without dead ends: 41 [2020-11-22 13:01:12,113 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 13:01:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-22 13:01:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2020-11-22 13:01:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2020-11-22 13:01:12,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 7 [2020-11-22 13:01:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,117 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2020-11-22 13:01:12,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2020-11-22 13:01:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:01:12,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:01:12,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2093929514, now seen corresponding path program 1 times [2020-11-22 13:01:12,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122588903] [2020-11-22 13:01:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,195 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 13:01:12,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122588903] [2020-11-22 13:01:12,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313758591] [2020-11-22 13:01:12,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,198 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand 4 states. [2020-11-22 13:01:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,225 INFO L93 Difference]: Finished difference Result 39 states and 64 transitions. [2020-11-22 13:01:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:01:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,226 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:01:12,226 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:01:12,227 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 13:01:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:01:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2020-11-22 13:01:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 37 transitions. [2020-11-22 13:01:12,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 37 transitions. Word has length 8 [2020-11-22 13:01:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,230 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 37 transitions. [2020-11-22 13:01:12,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 37 transitions. [2020-11-22 13:01:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:01:12,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:01:12,233 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,234 INFO L82 PathProgramCache]: Analyzing trace with hash 487519848, now seen corresponding path program 1 times [2020-11-22 13:01:12,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559998861] [2020-11-22 13:01:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,286 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 13:01:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559998861] [2020-11-22 13:01:12,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390724298] [2020-11-22 13:01:12,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,288 INFO L87 Difference]: Start difference. First operand 23 states and 37 transitions. Second operand 4 states. [2020-11-22 13:01:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,316 INFO L93 Difference]: Finished difference Result 37 states and 59 transitions. [2020-11-22 13:01:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:01:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,317 INFO L225 Difference]: With dead ends: 37 [2020-11-22 13:01:12,317 INFO L226 Difference]: Without dead ends: 37 [2020-11-22 13:01:12,318 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 13:01:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-22 13:01:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2020-11-22 13:01:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 36 transitions. [2020-11-22 13:01:12,321 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 36 transitions. Word has length 9 [2020-11-22 13:01:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,322 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 36 transitions. [2020-11-22 13:01:12,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 36 transitions. [2020-11-22 13:01:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:01:12,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:01:12,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2066539201, now seen corresponding path program 1 times [2020-11-22 13:01:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628493286] [2020-11-22 13:01:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,383 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 13:01:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628493286] [2020-11-22 13:01:12,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702359681] [2020-11-22 13:01:12,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,385 INFO L87 Difference]: Start difference. First operand 23 states and 36 transitions. Second operand 4 states. [2020-11-22 13:01:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,412 INFO L93 Difference]: Finished difference Result 35 states and 54 transitions. [2020-11-22 13:01:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:01:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,413 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:01:12,414 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:01:12,414 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 13:01:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:01:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2020-11-22 13:01:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2020-11-22 13:01:12,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 10 [2020-11-22 13:01:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,417 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2020-11-22 13:01:12,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2020-11-22 13:01:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:01:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:01:12,419 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash 362009245, now seen corresponding path program 1 times [2020-11-22 13:01:12,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491412128] [2020-11-22 13:01:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,462 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 13:01:12,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491412128] [2020-11-22 13:01:12,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904042089] [2020-11-22 13:01:12,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,464 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand 4 states. [2020-11-22 13:01:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,480 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2020-11-22 13:01:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:01:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,482 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:01:12,482 INFO L226 Difference]: Without dead ends: 33 [2020-11-22 13:01:12,482 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 13:01:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-22 13:01:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-11-22 13:01:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2020-11-22 13:01:12,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 11 [2020-11-22 13:01:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,486 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-11-22 13:01:12,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2020-11-22 13:01:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:01:12,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:01:12,487 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1662399916, now seen corresponding path program 1 times [2020-11-22 13:01:12,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308801808] [2020-11-22 13:01:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,530 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 13:01:12,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308801808] [2020-11-22 13:01:12,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006891365] [2020-11-22 13:01:12,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,533 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand 4 states. [2020-11-22 13:01:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,574 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2020-11-22 13:01:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:01:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,575 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:01:12,575 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 13:01:12,576 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 13:01:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 13:01:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-22 13:01:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2020-11-22 13:01:12,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2020-11-22 13:01:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,579 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2020-11-22 13:01:12,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2020-11-22 13:01:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:01:12,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:01:12,580 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash 5425874, now seen corresponding path program 1 times [2020-11-22 13:01:12,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557117614] [2020-11-22 13:01:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,619 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 13:01:12,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557117614] [2020-11-22 13:01:12,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366229987] [2020-11-22 13:01:12,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,622 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 4 states. [2020-11-22 13:01:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,645 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2020-11-22 13:01:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 13:01:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,646 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:01:12,646 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:01:12,647 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 13:01:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:01:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-11-22 13:01:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:01:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2020-11-22 13:01:12,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2020-11-22 13:01:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,650 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2020-11-22 13:01:12,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2020-11-22 13:01:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:01:12,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:01:12,651 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:01:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,651 INFO L82 PathProgramCache]: Analyzing trace with hash 168418153, now seen corresponding path program 1 times [2020-11-22 13:01:12,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413566825] [2020-11-22 13:01:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,692 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 13:01:12,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413566825] [2020-11-22 13:01:12,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842584248] [2020-11-22 13:01:12,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,694 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand 4 states. [2020-11-22 13:01:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,716 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2020-11-22 13:01:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:12,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:01:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,717 INFO L225 Difference]: With dead ends: 23 [2020-11-22 13:01:12,717 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:01:12,718 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 13:01:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:01:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:01:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:01:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:01:12,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-11-22 13:01:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,719 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:01:12,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:01:12,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:01:12,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:01:12,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:12 BoogieIcfgContainer [2020-11-22 13:01:12,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:12,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:12,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:12,725 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:12,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:11" (3/4) ... [2020-11-22 13:01:12,729 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:01:12,741 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-22 13:01:12,741 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:01:12,742 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:01:12,742 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:12,794 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_65deac7c-66ec-4345-a3cc-108e97e8745a/bin/utaipan/witness.graphml [2020-11-22 13:01:12,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:12,796 INFO L168 Benchmark]: Toolchain (without parser) took 2551.88 ms. Allocated memory was 79.7 MB in the beginning and 123.7 MB in the end (delta: 44.0 MB). Free memory was 49.0 MB in the beginning and 62.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,797 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 50.2 MB in the beginning and 50.2 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:12,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.98 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 48.8 MB in the beginning and 80.5 MB in the end (delta: -31.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.57 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 78.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,798 INFO L168 Benchmark]: Boogie Preprocessor took 26.44 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,798 INFO L168 Benchmark]: RCFGBuilder took 795.22 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 72.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,799 INFO L168 Benchmark]: TraceAbstraction took 1302.83 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 71.6 MB in the beginning and 66.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,799 INFO L168 Benchmark]: Witness Printer took 69.79 ms. Allocated memory is still 123.7 MB. Free memory was 65.7 MB in the beginning and 62.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:12,802 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 50.2 MB in the beginning and 50.2 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.98 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 48.8 MB in the beginning and 80.5 MB in the end (delta: -31.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.57 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 78.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.44 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 795.22 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 72.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1302.83 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 71.6 MB in the beginning and 66.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * Witness Printer took 69.79 ms. Allocated memory is still 123.7 MB. Free memory was 65.7 MB in the beginning and 62.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 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, 27 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 382 SDtfs, 289 SDslu, 430 SDs, 0 SdLazy, 81 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 11 MinimizatonAttempts, 104 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 3798 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...