./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-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_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/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 822411a57a10ce043cb0121fce52bdc7e9506783 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:03:50,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:50,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:50,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:50,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:50,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:50,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:50,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:50,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:50,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:50,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:50,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:50,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:50,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:50,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:50,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:50,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:50,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:50,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:50,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:50,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:50,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:50,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:50,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:50,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:50,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:50,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:50,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:50,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:50,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:50,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:50,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:50,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:50,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:50,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:50,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:50,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:50,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:50,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:50,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:50,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:50,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:03:50,847 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:50,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:50,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:50,848 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:50,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:50,848 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:50,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:03:50,849 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:50,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:50,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:03:50,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:03:50,850 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:50,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:03:50,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:03:50,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:03:50,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:03:50,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:03:50,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:50,852 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:50,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:03:50,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:03:50,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:50,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:50,853 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:03:50,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:03:50,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:03:50,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:50,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:50,854 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:50,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:50,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:50,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:50,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:50,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:50,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:50,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:50,856 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:03:50,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:03:50,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:50,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:50,857 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_f36af600-67d9-4eba-8dd9-cab47016d5e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 822411a57a10ce043cb0121fce52bdc7e9506783 [2020-11-22 13:03:51,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:51,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:51,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:51,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:51,122 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:51,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2020-11-22 13:03:51,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/data/ca5b6cfb1/13e352ded9634a77b9b4d2a3c48d0348/FLAGabe8b0fe9 [2020-11-22 13:03:51,797 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:51,797 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2020-11-22 13:03:51,812 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/data/ca5b6cfb1/13e352ded9634a77b9b4d2a3c48d0348/FLAGabe8b0fe9 [2020-11-22 13:03:52,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/data/ca5b6cfb1/13e352ded9634a77b9b4d2a3c48d0348 [2020-11-22 13:03:52,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:52,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:52,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:52,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:52,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:52,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e31cf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52, skipping insertion in model container [2020-11-22 13:03:52,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:52,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:52,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:52,601 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:52,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:52,718 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:52,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52 WrapperNode [2020-11-22 13:03:52,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:52,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:52,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:52,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:52,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:52,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:52,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:52,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:52,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... [2020-11-22 13:03:52,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:52,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:52,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:52,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:52,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:03:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:03:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:52,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:53,392 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:53,392 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:03:53,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:53 BoogieIcfgContainer [2020-11-22 13:03:53,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:53,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:53,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:53,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:53,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:52" (1/3) ... [2020-11-22 13:03:53,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74535b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:53, skipping insertion in model container [2020-11-22 13:03:53,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:52" (2/3) ... [2020-11-22 13:03:53,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74535b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:53, skipping insertion in model container [2020-11-22 13:03:53,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:53" (3/3) ... [2020-11-22 13:03:53,406 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca-2.i [2020-11-22 13:03:53,417 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:53,423 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 13:03:53,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 13:03:53,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:53,466 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:03:53,466 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:53,466 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:53,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:53,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:53,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:53,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-22 13:03:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:03:53,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:53,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:03:53,483 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash 76485, now seen corresponding path program 1 times [2020-11-22 13:03:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480290108] [2020-11-22 13:03:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:53,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480290108] [2020-11-22 13:03:53,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:03:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371553882] [2020-11-22 13:03:53,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:03:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:03:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:53,670 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-22 13:03:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:53,702 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-22 13:03:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:03:53,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:03:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:53,709 INFO L225 Difference]: With dead ends: 12 [2020-11-22 13:03:53,709 INFO L226 Difference]: Without dead ends: 10 [2020-11-22 13:03:53,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:03:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-22 13:03:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-22 13:03:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 13:03:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-22 13:03:53,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 3 [2020-11-22 13:03:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:53,737 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-22 13:03:53,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:03:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-22 13:03:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:03:53,737 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:53,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:03:53,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:03:53,738 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 73547189, now seen corresponding path program 1 times [2020-11-22 13:03:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627053030] [2020-11-22 13:03:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:53,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627053030] [2020-11-22 13:03:53,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:53,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:03:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323209291] [2020-11-22 13:03:53,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:53,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:53,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:53,812 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-11-22 13:03:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:53,851 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-11-22 13:03:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:53,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 13:03:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:53,852 INFO L225 Difference]: With dead ends: 9 [2020-11-22 13:03:53,852 INFO L226 Difference]: Without dead ends: 9 [2020-11-22 13:03:53,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-22 13:03:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-22 13:03:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-22 13:03:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-22 13:03:53,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-11-22 13:03:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:53,855 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-22 13:03:53,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-22 13:03:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:03:53,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:53,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:03:53,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:03:53,856 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash 73547190, now seen corresponding path program 1 times [2020-11-22 13:03:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:53,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295671553] [2020-11-22 13:03:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:53,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295671553] [2020-11-22 13:03:53,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:53,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:03:53,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600726265] [2020-11-22 13:03:53,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:53,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:54,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:54,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:54,000 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-11-22 13:03:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:54,060 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-22 13:03:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:03:54,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 13:03:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:54,061 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:03:54,061 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:03:54,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:03:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:03:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2020-11-22 13:03:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:03:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-22 13:03:54,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2020-11-22 13:03:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:54,065 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-22 13:03:54,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-22 13:03:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:54,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:54,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:03:54,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:03:54,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2015006103, now seen corresponding path program 1 times [2020-11-22 13:03:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:54,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255147868] [2020-11-22 13:03:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:54,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255147868] [2020-11-22 13:03:54,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:54,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861959882] [2020-11-22 13:03:54,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:54,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:54,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:54,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:54,213 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-11-22 13:03:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:54,266 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-22 13:03:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:03:54,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 13:03:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:54,268 INFO L225 Difference]: With dead ends: 12 [2020-11-22 13:03:54,268 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 13:03:54,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:03:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 13:03:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-22 13:03:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:03:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 13:03:54,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-11-22 13:03:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:54,271 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 13:03:54,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 13:03:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:03:54,272 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:54,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-22 13:03:54,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:03:54,272 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash 611367033, now seen corresponding path program 1 times [2020-11-22 13:03:54,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:54,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948169771] [2020-11-22 13:03:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:54,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948169771] [2020-11-22 13:03:54,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219314446] [2020-11-22 13:03:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:54,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-22 13:03:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:54,677 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 13:03:54,678 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:54,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:03:54,687 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:03:54,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2020-11-22 13:03:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:54,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:55,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 13:03:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:55,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921889810] [2020-11-22 13:03:55,400 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:03:55,400 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:03:55,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:03:55,415 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:03:55,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:03:56,210 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:03:56,515 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-11-22 13:03:56,937 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-11-22 13:03:57,353 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-22 13:03:57,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:03:57,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:03:57,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2020-11-22 13:03:57,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473663601] [2020-11-22 13:03:57,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-22 13:03:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:57,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-22 13:03:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2020-11-22 13:03:57,359 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2020-11-22 13:03:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:57,769 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-22 13:03:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:03:57,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 8 [2020-11-22 13:03:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:57,770 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:03:57,770 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:03:57,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2020-11-22 13:03:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:03:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-22 13:03:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:03:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-22 13:03:57,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2020-11-22 13:03:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:57,773 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-22 13:03:57,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-22 13:03:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-22 13:03:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:03:57,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:57,773 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:57,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:57,974 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1772507142, now seen corresponding path program 1 times [2020-11-22 13:03:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115709242] [2020-11-22 13:03:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:03:58,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115709242] [2020-11-22 13:03:58,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:58,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:03:58,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315866326] [2020-11-22 13:03:58,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:58,062 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-11-22 13:03:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:58,079 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-22 13:03:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:58,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:03:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:58,080 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:03:58,080 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 13:03:58,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 13:03:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 13:03:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-22 13:03:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:03:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 13:03:58,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-11-22 13:03:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:58,082 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 13:03:58,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 13:03:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:58,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:58,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2020-11-22 13:03:58,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-22 13:03:58,083 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:03:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1720671530, now seen corresponding path program 2 times [2020-11-22 13:03:58,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:58,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825478143] [2020-11-22 13:03:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825478143] [2020-11-22 13:03:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417598767] [2020-11-22 13:03:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:58,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-22 13:03:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:03:58,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-22 13:03:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:59,619 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-11-22 13:04:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:00,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693552614] [2020-11-22 13:04:00,097 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:04:00,098 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:04:00,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:04:00,098 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:04:00,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:04:00,496 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:04:00,780 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-11-22 13:04:01,222 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-22 13:04:01,224 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:04:01,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:04:01,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2020-11-22 13:04:01,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061474138] [2020-11-22 13:04:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-22 13:04:01,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-22 13:04:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-11-22 13:04:01,226 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 27 states. [2020-11-22 13:04:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:02,213 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-22 13:04:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-22 13:04:02,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 11 [2020-11-22 13:04:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:02,214 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:04:02,214 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:04:02,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2020-11-22 13:04:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:04:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:04:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:04:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:04:02,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-11-22 13:04:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:02,216 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:04:02,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-22 13:04:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:04:02,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:04:02,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:04:02,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:04:02 BoogieIcfgContainer [2020-11-22 13:04:02,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:04:02,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:04:02,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:04:02,434 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:04:02,434 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:53" (3/4) ... [2020-11-22 13:04:02,436 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:04:02,447 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 13:04:02,448 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:04:02,448 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:04:02,485 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f36af600-67d9-4eba-8dd9-cab47016d5e1/bin/utaipan/witness.graphml [2020-11-22 13:04:02,486 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:04:02,487 INFO L168 Benchmark]: Toolchain (without parser) took 10281.62 ms. Allocated memory was 130.0 MB in the beginning and 195.0 MB in the end (delta: 65.0 MB). Free memory was 100.2 MB in the beginning and 78.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 87.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,487 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:02,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 513.27 ms. Allocated memory is still 130.0 MB. Free memory was 100.2 MB in the beginning and 97.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.10 ms. Allocated memory is still 130.0 MB. Free memory was 97.3 MB in the beginning and 95.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,488 INFO L168 Benchmark]: Boogie Preprocessor took 39.94 ms. Allocated memory is still 130.0 MB. Free memory was 95.6 MB in the beginning and 94.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:02,492 INFO L168 Benchmark]: RCFGBuilder took 580.46 ms. Allocated memory is still 130.0 MB. Free memory was 94.5 MB in the beginning and 77.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,492 INFO L168 Benchmark]: TraceAbstraction took 9035.02 ms. Allocated memory was 130.0 MB in the beginning and 195.0 MB in the end (delta: 65.0 MB). Free memory was 76.8 MB in the beginning and 81.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,493 INFO L168 Benchmark]: Witness Printer took 52.09 ms. Allocated memory is still 195.0 MB. Free memory was 81.4 MB in the beginning and 78.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:02,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 513.27 ms. Allocated memory is still 130.0 MB. Free memory was 100.2 MB in the beginning and 97.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.10 ms. Allocated memory is still 130.0 MB. Free memory was 97.3 MB in the beginning and 95.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.94 ms. Allocated memory is still 130.0 MB. Free memory was 95.6 MB in the beginning and 94.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 580.46 ms. Allocated memory is still 130.0 MB. Free memory was 94.5 MB in the beginning and 77.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9035.02 ms. Allocated memory was 130.0 MB in the beginning and 195.0 MB in the end (delta: 65.0 MB). Free memory was 76.8 MB in the beginning and 81.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. * Witness Printer took 52.09 ms. Allocated memory is still 195.0 MB. Free memory was 81.4 MB in the beginning and 78.6 MB in the end (delta: 2.8 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: 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]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 45 SDslu, 80 SDs, 0 SdLazy, 258 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 74 ConstructedInterpolants, 1 QuantifiedInterpolants, 9649 SizeOfPredicates, 32 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 2/38 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...