./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --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_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/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 50bdaf600d03af0a677a59daf6a875dbe69c10b2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:06:46,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:46,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:46,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:46,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:46,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:46,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:46,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:46,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:46,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:46,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:46,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:46,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:46,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:46,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:46,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:46,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:46,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:46,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:46,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:46,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:46,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:46,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:46,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:46,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:46,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:46,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:46,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:46,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:46,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:46,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:46,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:46,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:46,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:46,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:46,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:46,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:46,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:46,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:46,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:46,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:46,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:06:46,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:46,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:46,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:46,837 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:46,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:46,837 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:46,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:46,838 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:46,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:46,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:46,839 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:46,840 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:46,840 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:46,840 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:46,840 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:46,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:06:46,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:06:46,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:46,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:46,843 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:06:46,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:46,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:46,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:46,844 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:06:46,844 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:06:46,844 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:06:46,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:46,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:46,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:46,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:46,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:46,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:46,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:46,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:46,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:46,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:46,847 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:46,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:46,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:46,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:46,848 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_ffa8f122-85be-4219-a22d-912cd278c11d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2020-11-22 13:06:47,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:47,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:47,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:47,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:47,226 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:47,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-22 13:06:47,291 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/data/38ecbb6e1/794dbb0a55a44cc8ac513a10c5c452fd/FLAG99ad718cf [2020-11-22 13:06:47,988 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:47,989 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-22 13:06:48,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/data/38ecbb6e1/794dbb0a55a44cc8ac513a10c5c452fd/FLAG99ad718cf [2020-11-22 13:06:48,301 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/data/38ecbb6e1/794dbb0a55a44cc8ac513a10c5c452fd [2020-11-22 13:06:48,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:48,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:48,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:48,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:48,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:48,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548f42fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48, skipping insertion in model container [2020-11-22 13:06:48,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:48,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:48,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:48,755 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:48,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:48,879 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:48,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48 WrapperNode [2020-11-22 13:06:48,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:48,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:48,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:48,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:48,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:48,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:48,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:48,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:48,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... [2020-11-22 13:06:48,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:48,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:48,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:48,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:48,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/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 13:06:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:06:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:06:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:06:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:49,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:49,683 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:49,683 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 13:06:49,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:49 BoogieIcfgContainer [2020-11-22 13:06:49,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:49,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:49,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:49,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:49,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:48" (1/3) ... [2020-11-22 13:06:49,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd0875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:49, skipping insertion in model container [2020-11-22 13:06:49,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:48" (2/3) ... [2020-11-22 13:06:49,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd0875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:49, skipping insertion in model container [2020-11-22 13:06:49,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:49" (3/3) ... [2020-11-22 13:06:49,710 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-11-22 13:06:49,720 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:49,741 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-22 13:06:49,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-22 13:06:49,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:49,794 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:06:49,794 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:49,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:49,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:49,794 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:49,795 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:49,795 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-22 13:06:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:06:49,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:49,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:06:49,811 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:49,817 INFO L82 PathProgramCache]: Analyzing trace with hash 104334, now seen corresponding path program 1 times [2020-11-22 13:06:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:49,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503859843] [2020-11-22 13:06:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:49,970 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 13:06:49,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503859843] [2020-11-22 13:06:49,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:49,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:06:49,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490387344] [2020-11-22 13:06:49,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:49,993 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-22 13:06:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,060 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-22 13:06:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:50,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:06:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,070 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:06:50,070 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:06:50,073 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 13:06:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:06:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-22 13:06:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:06:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-22 13:06:50,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2020-11-22 13:06:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,101 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-22 13:06:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-22 13:06:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:06:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:06:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:50,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 104335, now seen corresponding path program 1 times [2020-11-22 13:06:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372807607] [2020-11-22 13:06:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:50,227 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 13:06:50,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372807607] [2020-11-22 13:06:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707606127] [2020-11-22 13:06:50,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:50,231 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-11-22 13:06:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,391 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-22 13:06:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:50,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-22 13:06:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,393 INFO L225 Difference]: With dead ends: 40 [2020-11-22 13:06:50,393 INFO L226 Difference]: Without dead ends: 40 [2020-11-22 13:06:50,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-22 13:06:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-11-22 13:06:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:06:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-22 13:06:50,399 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2020-11-22 13:06:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,400 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-22 13:06:50,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-22 13:06:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:06:50,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:06:50,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:06:50,401 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 106111, now seen corresponding path program 1 times [2020-11-22 13:06:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45300353] [2020-11-22 13:06:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:50,482 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 13:06:50,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45300353] [2020-11-22 13:06:50,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:50,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:06:50,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69391511] [2020-11-22 13:06:50,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:50,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:50,484 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-11-22 13:06:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,531 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-22 13:06:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:50,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:06:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,532 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:06:50,532 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 13:06:50,533 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 13:06:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 13:06:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-22 13:06:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:06:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-22 13:06:50,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2020-11-22 13:06:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,537 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-22 13:06:50,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-22 13:06:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:06:50,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:06:50,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:06:50,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 3290841, now seen corresponding path program 1 times [2020-11-22 13:06:50,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536551754] [2020-11-22 13:06:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:50,582 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 13:06:50,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536551754] [2020-11-22 13:06:50,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:50,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:50,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98649551] [2020-11-22 13:06:50,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:50,585 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2020-11-22 13:06:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,650 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-22 13:06:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:50,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 13:06:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,652 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:06:50,652 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:06:50,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:06:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 13:06:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:06:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-22 13:06:50,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-11-22 13:06:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,656 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-22 13:06:50,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-22 13:06:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:06:50,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:06:50,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:06:50,658 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash 3290842, now seen corresponding path program 1 times [2020-11-22 13:06:50,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165661386] [2020-11-22 13:06:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:50,837 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 13:06:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165661386] [2020-11-22 13:06:50,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:50,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:50,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736160757] [2020-11-22 13:06:50,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:50,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:50,840 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-11-22 13:06:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:50,917 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-22 13:06:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:50,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:06:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:50,919 INFO L225 Difference]: With dead ends: 18 [2020-11-22 13:06:50,919 INFO L226 Difference]: Without dead ends: 18 [2020-11-22 13:06:50,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-22 13:06:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-22 13:06:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 13:06:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-22 13:06:50,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-11-22 13:06:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:50,922 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-22 13:06:50,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-22 13:06:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:06:50,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:50,923 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-22 13:06:50,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:06:50,924 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash 100314532, now seen corresponding path program 1 times [2020-11-22 13:06:50,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:50,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049526207] [2020-11-22 13:06:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049526207] [2020-11-22 13:06:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772970536] [2020-11-22 13:06:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 13:06:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:51,171 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-22 13:06:51,172 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:06:51,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:06:51,182 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:06:51,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-22 13:06:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:51,349 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 13:06:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426200338] [2020-11-22 13:06:51,432 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-22 13:06:51,432 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:51,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:51,452 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:51,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:52,087 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:52,509 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-22 13:06:52,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:52,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:06:52,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-22 13:06:52,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463899289] [2020-11-22 13:06:52,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:06:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:06:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:06:52,621 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2020-11-22 13:06:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:52,860 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-22 13:06:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:06:52,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-22 13:06:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:52,862 INFO L225 Difference]: With dead ends: 42 [2020-11-22 13:06:52,862 INFO L226 Difference]: Without dead ends: 42 [2020-11-22 13:06:52,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:06:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-22 13:06:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 15. [2020-11-22 13:06:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:06:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-22 13:06:52,865 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-11-22 13:06:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:52,865 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-22 13:06:52,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:06:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-22 13:06:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:06:52,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:52,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:53,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:06:53,067 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash -746792725, now seen corresponding path program 1 times [2020-11-22 13:06:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:53,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62963930] [2020-11-22 13:06:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:53,151 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 13:06:53,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62963930] [2020-11-22 13:06:53,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:53,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:53,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712324221] [2020-11-22 13:06:53,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:53,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:53,153 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-22 13:06:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:53,173 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-22 13:06:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:53,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:06:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:53,174 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:06:53,174 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 13:06:53,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 13:06:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-22 13:06:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:06:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-22 13:06:53,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-11-22 13:06:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-22 13:06:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-22 13:06:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:06:53,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:53,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:53,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-22 13:06:53,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash -407205654, now seen corresponding path program 1 times [2020-11-22 13:06:53,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:53,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013334196] [2020-11-22 13:06:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:53,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013334196] [2020-11-22 13:06:53,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:53,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:06:53,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117780537] [2020-11-22 13:06:53,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:06:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:06:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:06:53,333 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-22 13:06:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:53,476 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-22 13:06:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:06:53,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-22 13:06:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:53,477 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:06:53,477 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 13:06:53,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 13:06:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-22 13:06:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 13:06:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-22 13:06:53,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-11-22 13:06:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:53,480 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-22 13:06:53,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:06:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-22 13:06:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:06:53,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:53,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:53,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-22 13:06:53,481 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash -286393537, now seen corresponding path program 1 times [2020-11-22 13:06:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:53,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199837741] [2020-11-22 13:06:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199837741] [2020-11-22 13:06:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178834453] [2020-11-22 13:06:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-22 13:06:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:53,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:53,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544889451] [2020-11-22 13:06:53,821 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-22 13:06:53,821 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:53,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:53,822 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:53,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:54,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:54,854 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-22 13:06:55,146 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-22 13:06:55,390 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-22 13:06:55,543 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-22 13:06:55,693 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-22 13:06:55,840 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-22 13:06:55,894 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:06:56,139 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-22 13:06:56,421 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-22 13:06:56,957 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-22 13:06:57,178 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-22 13:06:57,448 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-22 13:06:57,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:06:57,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:06:57,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-22 13:06:57,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792839544] [2020-11-22 13:06:57,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-22 13:06:57,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-22 13:06:57,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-22 13:06:57,451 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 12 states. [2020-11-22 13:06:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:57,727 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-22 13:06:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:06:57,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-11-22 13:06:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:57,728 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:06:57,728 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:06:57,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-11-22 13:06:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:06:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-11-22 13:06:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:06:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-22 13:06:57,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-11-22 13:06:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:57,732 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-22 13:06:57,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-22 13:06:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-22 13:06:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:06:57,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:57,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:57,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-22 13:06:57,945 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:06:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 403880869, now seen corresponding path program 2 times [2020-11-22 13:06:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:57,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933120194] [2020-11-22 13:06:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:58,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933120194] [2020-11-22 13:06:58,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788434066] [2020-11-22 13:06:58,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:58,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-22 13:06:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:06:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-22 13:06:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:06:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:06:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852787389] [2020-11-22 13:06:58,846 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-22 13:06:58,846 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:06:58,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:06:58,847 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:06:58,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:06:59,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:06:59,710 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-22 13:06:59,941 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-22 13:07:00,508 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:00,753 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-22 13:07:01,055 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-22 13:07:01,423 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-22 13:07:01,582 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-22 13:07:01,777 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-22 13:07:01,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:01,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:01,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2020-11-22 13:07:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437620327] [2020-11-22 13:07:01,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-22 13:07:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-22 13:07:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-11-22 13:07:01,780 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 22 states. [2020-11-22 13:07:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:02,491 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-22 13:07:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-22 13:07:02,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-11-22 13:07:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:02,492 INFO L225 Difference]: With dead ends: 30 [2020-11-22 13:07:02,493 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:07:02,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2020-11-22 13:07:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:07:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:07:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:07:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:07:02,494 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-22 13:07:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:02,495 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:07:02,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-22 13:07:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:07:02,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:07:02,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:02,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:07:02 BoogieIcfgContainer [2020-11-22 13:07:02,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:07:02,700 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:07:02,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:07:02,700 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:07:02,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:49" (3/4) ... [2020-11-22 13:07:02,702 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:07:02,710 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 13:07:02,710 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 13:07:02,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:07:02,743 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ffa8f122-85be-4219-a22d-912cd278c11d/bin/utaipan/witness.graphml [2020-11-22 13:07:02,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:07:02,745 INFO L168 Benchmark]: Toolchain (without parser) took 14439.47 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 63.9 MB in the beginning and 174.6 MB in the end (delta: -110.7 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,747 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 73.3 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:02,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.30 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 64.6 MB in the end (delta: -791.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.73 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 62.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,748 INFO L168 Benchmark]: Boogie Preprocessor took 54.22 ms. Allocated memory is still 98.6 MB. Free memory was 62.9 MB in the beginning and 61.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,748 INFO L168 Benchmark]: RCFGBuilder took 688.06 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 37.3 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,751 INFO L168 Benchmark]: TraceAbstraction took 13013.12 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 37.0 MB in the beginning and 177.3 MB in the end (delta: -140.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,754 INFO L168 Benchmark]: Witness Printer took 44.51 ms. Allocated memory is still 251.7 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:02,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 73.3 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 571.30 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 64.6 MB in the end (delta: -791.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.73 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 62.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.22 ms. Allocated memory is still 98.6 MB. Free memory was 62.9 MB in the beginning and 61.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 688.06 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 37.3 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13013.12 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 37.0 MB in the beginning and 177.3 MB in the end (delta: -140.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * Witness Printer took 44.51 ms. Allocated memory is still 251.7 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.7 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: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 360 SDslu, 175 SDs, 0 SdLazy, 453 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 113 ConstructedInterpolants, 12 QuantifiedInterpolants, 14073 SizeOfPredicates, 25 NumberOfNonLiveVariables, 229 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 11/37 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...