./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/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 e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:27:26,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:27:26,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:27:26,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:27:26,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:27:26,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:27:26,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:27:26,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:27:26,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:27:26,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:27:26,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:27:26,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:27:26,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:27:26,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:27:26,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:27:26,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:27:26,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:27:26,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:27:26,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:27:26,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:27:26,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:27:26,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:27:26,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:27:26,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:27:26,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:27:26,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:27:26,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:27:26,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:27:26,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:27:26,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:27:26,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:27:26,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:27:26,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:27:26,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:27:26,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:27:26,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:27:26,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:27:26,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:27:26,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:27:26,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:27:26,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:27:26,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:27:26,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:27:26,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:27:26,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:27:26,945 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:27:26,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:27:26,946 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:27:26,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:27:26,946 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:27:26,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:27:26,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:27:26,948 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:27:26,948 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:27:26,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:27:26,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:27:26,949 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:27:26,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:27:26,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:27:26,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:27:26,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:27:26,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:27:26,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:27:26,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:27:26,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:27:26,951 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:27:26,951 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:27:26,951 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:27:26,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:27:26,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:27:26,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:27:26,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:27:26,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:27:26,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:27:26,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:27:26,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:26,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:27:26,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:27:26,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:27:26,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:27:26,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:27:26,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:27:26,955 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_be4d310d-f72f-459f-b0f0-a133589a7be3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2020-11-28 07:27:27,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:27:27,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:27:27,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:27:27,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:27:27,371 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:27:27,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-11-28 07:27:27,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/data/654b4148d/380de936fc2146a3b5ae70e5052eb632/FLAG22514bb65 [2020-11-28 07:27:27,951 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:27:27,951 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-11-28 07:27:27,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/data/654b4148d/380de936fc2146a3b5ae70e5052eb632/FLAG22514bb65 [2020-11-28 07:27:28,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/data/654b4148d/380de936fc2146a3b5ae70e5052eb632 [2020-11-28 07:27:28,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:27:28,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:27:28,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:28,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:27:28,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:27:28,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d02723f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28, skipping insertion in model container [2020-11-28 07:27:28,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:27:28,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:27:28,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:28,598 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:27:28,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:28,650 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:27:28,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28 WrapperNode [2020-11-28 07:27:28,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:28,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:28,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:27:28,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:27:28,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:28,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:27:28,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:27:28,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:27:28,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... [2020-11-28 07:27:28,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:27:28,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:27:28,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:27:28,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:27:28,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/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 [2020-11-28 07:27:28,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:27:28,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:27:28,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:27:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:27:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:27:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:27:29,444 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:27:29,445 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 07:27:29,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:29 BoogieIcfgContainer [2020-11-28 07:27:29,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:27:29,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:27:29,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:27:29,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:27:29,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:27:28" (1/3) ... [2020-11-28 07:27:29,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8284bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:29, skipping insertion in model container [2020-11-28 07:27:29,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:28" (2/3) ... [2020-11-28 07:27:29,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8284bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:29, skipping insertion in model container [2020-11-28 07:27:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:29" (3/3) ... [2020-11-28 07:27:29,460 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2020-11-28 07:27:29,473 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:27:29,478 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-11-28 07:27:29,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-11-28 07:27:29,521 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:27:29,522 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:27:29,522 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:27:29,522 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:27:29,522 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:27:29,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:27:29,523 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:27:29,523 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:27:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-28 07:27:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:27:29,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:29,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:27:29,545 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 81046, now seen corresponding path program 1 times [2020-11-28 07:27:29,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:29,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601222952] [2020-11-28 07:27:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601222952] [2020-11-28 07:27:29,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:29,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:27:29,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055102975] [2020-11-28 07:27:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:29,754 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-11-28 07:27:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:29,819 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-11-28 07:27:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:29,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:27:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:29,831 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:27:29,831 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:27:29,833 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 [2020-11-28 07:27:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:27:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 07:27:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 07:27:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-28 07:27:29,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2020-11-28 07:27:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:29,865 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-28 07:27:29,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-28 07:27:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:27:29,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:29,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:27:29,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:27:29,867 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash 81047, now seen corresponding path program 1 times [2020-11-28 07:27:29,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:29,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830654192] [2020-11-28 07:27:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:29,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830654192] [2020-11-28 07:27:29,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:29,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:27:29,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826575503] [2020-11-28 07:27:29,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:29,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:29,940 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2020-11-28 07:27:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:30,050 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-11-28 07:27:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:30,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:27:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:30,052 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:27:30,052 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:27:30,053 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 [2020-11-28 07:27:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:27:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:27:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:27:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 07:27:30,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2020-11-28 07:27:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:30,060 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 07:27:30,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 07:27:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:27:30,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:30,062 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:27:30,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:27:30,063 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash 77927813, now seen corresponding path program 1 times [2020-11-28 07:27:30,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:30,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390388855] [2020-11-28 07:27:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:30,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390388855] [2020-11-28 07:27:30,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009962634] [2020-11-28 07:27:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/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 [2020-11-28 07:27:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:27:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:30,424 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 [2020-11-28 07:27:30,425 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:27:30,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:27:30,437 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:27:30,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:27:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:30,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:30,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180251133] [2020-11-28 07:27:30,534 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:27:30,534 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:30,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:30,547 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:30,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:31,042 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:31,176 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-11-28 07:27:31,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:31,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:31,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:27:31,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600557211] [2020-11-28 07:27:31,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:27:31,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:27:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:27:31,304 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-11-28 07:27:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:31,450 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-28 07:27:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:27:31,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-28 07:27:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:31,453 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:27:31,453 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:27:31,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:27:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:27:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:27:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:27:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-28 07:27:31,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2020-11-28 07:27:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:31,459 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-28 07:27:31,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:27:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-28 07:27:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:27:31,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:31,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-28 07:27:31,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:27:31,663 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:31,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2028487428, now seen corresponding path program 1 times [2020-11-28 07:27:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:31,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610127608] [2020-11-28 07:27:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:27:31,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610127608] [2020-11-28 07:27:31,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:31,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:31,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153824035] [2020-11-28 07:27:31,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:31,718 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2020-11-28 07:27:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:31,767 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-28 07:27:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:31,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 07:27:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:31,769 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:27:31,769 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:27:31,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:27:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-11-28 07:27:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 07:27:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-28 07:27:31,780 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 8 [2020-11-28 07:27:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:31,780 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-28 07:27:31,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-28 07:27:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:27:31,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:31,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-28 07:27:31,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 07:27:31,782 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:31,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2028488527, now seen corresponding path program 1 times [2020-11-28 07:27:31,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:31,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606188499] [2020-11-28 07:27:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:31,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606188499] [2020-11-28 07:27:31,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031735739] [2020-11-28 07:27:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/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 [2020-11-28 07:27:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:27:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:31,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:32,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591801287] [2020-11-28 07:27:32,018 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:27:32,019 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:32,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:32,019 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:32,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:32,299 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:32,475 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:27:32,733 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 07:27:32,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:32,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:32,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-28 07:27:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446957125] [2020-11-28 07:27:32,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:27:32,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:27:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:32,759 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-11-28 07:27:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:32,821 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-28 07:27:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:27:32,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2020-11-28 07:27:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:32,826 INFO L225 Difference]: With dead ends: 29 [2020-11-28 07:27:32,826 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 07:27:32,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 07:27:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-28 07:27:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 07:27:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-28 07:27:32,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2020-11-28 07:27:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:32,831 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-28 07:27:32,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:27:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-28 07:27:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:27:32,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:32,832 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-11-28 07:27:33,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:33,047 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:33,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1976235185, now seen corresponding path program 2 times [2020-11-28 07:27:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:33,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849176306] [2020-11-28 07:27:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:33,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849176306] [2020-11-28 07:27:33,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225200920] [2020-11-28 07:27:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/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 [2020-11-28 07:27:33,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:27:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:27:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:27:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:27:33,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:27:33,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:27:33,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-11-28 07:27:33,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514366913] [2020-11-28 07:27:33,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:27:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:27:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:27:33,446 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-11-28 07:27:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:33,489 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-28 07:27:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:27:33,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 07:27:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:33,491 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:27:33,491 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:27:33,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:27:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:27:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 07:27:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 07:27:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-28 07:27:33,495 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2020-11-28 07:27:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:33,495 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-28 07:27:33,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:27:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-28 07:27:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:27:33,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:33,496 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-11-28 07:27:33,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-28 07:27:33,708 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 621829369, now seen corresponding path program 2 times [2020-11-28 07:27:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:33,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294180044] [2020-11-28 07:27:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:33,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294180044] [2020-11-28 07:27:33,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198705274] [2020-11-28 07:27:33,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:33,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:27:33,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:27:33,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 07:27:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:27:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:27:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:27:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-11-28 07:27:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094945300] [2020-11-28 07:27:34,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:27:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:27:34,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:34,212 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-11-28 07:27:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:34,363 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-28 07:27:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:27:34,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 07:27:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:34,365 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:27:34,365 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 07:27:34,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:27:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 07:27:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-11-28 07:27:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 07:27:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-28 07:27:34,370 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2020-11-28 07:27:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:34,371 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-28 07:27:34,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:27:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-28 07:27:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:27:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:34,374 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-11-28 07:27:34,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:34,576 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash 621829368, now seen corresponding path program 1 times [2020-11-28 07:27:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:34,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246063509] [2020-11-28 07:27:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246063509] [2020-11-28 07:27:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232232869] [2020-11-28 07:27:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:27:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:34,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:34,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487991414] [2020-11-28 07:27:34,866 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:27:34,866 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:34,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:34,866 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:34,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:35,102 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:35,260 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-28 07:27:35,537 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 07:27:35,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:35,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:35,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-11-28 07:27:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726109689] [2020-11-28 07:27:35,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:27:35,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:27:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:27:35,571 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 13 states. [2020-11-28 07:27:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:35,637 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-11-28 07:27:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:27:35,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-28 07:27:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:35,641 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:27:35,641 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 07:27:35,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:27:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 07:27:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-28 07:27:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 07:27:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-11-28 07:27:35,654 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2020-11-28 07:27:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:35,656 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-11-28 07:27:35,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:27:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-11-28 07:27:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 07:27:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:35,667 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2020-11-28 07:27:35,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-28 07:27:35,868 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash -714852032, now seen corresponding path program 2 times [2020-11-28 07:27:35,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:35,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489025238] [2020-11-28 07:27:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:35,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489025238] [2020-11-28 07:27:35,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:35,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:35,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740395115] [2020-11-28 07:27:35,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:35,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:35,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:35,938 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2020-11-28 07:27:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:35,970 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-28 07:27:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:35,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-28 07:27:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:35,971 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:27:35,972 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:27:35,972 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 [2020-11-28 07:27:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:27:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-28 07:27:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 07:27:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-11-28 07:27:35,975 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2020-11-28 07:27:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:35,976 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-11-28 07:27:35,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-11-28 07:27:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 07:27:35,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:35,977 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-11-28 07:27:35,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-28 07:27:35,977 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -685576509, now seen corresponding path program 1 times [2020-11-28 07:27:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:35,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931829426] [2020-11-28 07:27:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:36,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931829426] [2020-11-28 07:27:36,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:36,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:36,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123102423] [2020-11-28 07:27:36,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:36,031 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 3 states. [2020-11-28 07:27:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:36,054 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-11-28 07:27:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:36,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-28 07:27:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:36,055 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:27:36,055 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 07:27:36,056 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 [2020-11-28 07:27:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 07:27:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 07:27:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 07:27:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-11-28 07:27:36,059 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2020-11-28 07:27:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:36,060 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-11-28 07:27:36,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-11-28 07:27:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 07:27:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:36,061 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-11-28 07:27:36,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-28 07:27:36,061 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash -685576508, now seen corresponding path program 1 times [2020-11-28 07:27:36,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:36,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729552898] [2020-11-28 07:27:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:36,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729552898] [2020-11-28 07:27:36,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:27:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929270167] [2020-11-28 07:27:36,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:36,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:36,137 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2020-11-28 07:27:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:36,168 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-11-28 07:27:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:36,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-28 07:27:36,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:36,169 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:27:36,170 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 07:27:36,170 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 [2020-11-28 07:27:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 07:27:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 07:27:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 07:27:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-28 07:27:36,173 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2020-11-28 07:27:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:36,173 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-28 07:27:36,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-28 07:27:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 07:27:36,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:36,174 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:36,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-28 07:27:36,175 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1709004728, now seen corresponding path program 1 times [2020-11-28 07:27:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:36,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227839888] [2020-11-28 07:27:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:36,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227839888] [2020-11-28 07:27:36,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826891825] [2020-11-28 07:27:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:27:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:36,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:36,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154036384] [2020-11-28 07:27:36,339 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-28 07:27:36,340 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:36,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:36,340 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:36,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:36,897 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:37,053 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-11-28 07:27:37,286 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-11-28 07:27:37,429 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-28 07:27:37,633 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-28 07:27:37,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:37,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:37,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-11-28 07:27:37,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318803764] [2020-11-28 07:27:37,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:27:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:27:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:37,647 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-11-28 07:27:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:37,708 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-11-28 07:27:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:27:37,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-11-28 07:27:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:37,710 INFO L225 Difference]: With dead ends: 45 [2020-11-28 07:27:37,710 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 07:27:37,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 07:27:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-28 07:27:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:27:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-11-28 07:27:37,714 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2020-11-28 07:27:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:37,714 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-11-28 07:27:37,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:27:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-11-28 07:27:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 07:27:37,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:37,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2020-11-28 07:27:37,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:37,928 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1439573112, now seen corresponding path program 1 times [2020-11-28 07:27:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:37,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453159035] [2020-11-28 07:27:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453159035] [2020-11-28 07:27:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613586547] [2020-11-28 07:27:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:38,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:27:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:38,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:38,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116960281] [2020-11-28 07:27:38,149 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:27:38,149 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:38,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:38,151 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:38,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:38,722 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:38,959 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-11-28 07:27:39,232 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-11-28 07:27:39,410 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-28 07:27:39,633 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-28 07:27:39,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:39,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-28 07:27:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829310339] [2020-11-28 07:27:39,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:27:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:27:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:27:39,636 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 6 states. [2020-11-28 07:27:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:39,745 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-28 07:27:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:27:39,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-28 07:27:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:39,747 INFO L225 Difference]: With dead ends: 46 [2020-11-28 07:27:39,747 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 07:27:39,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:27:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 07:27:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-28 07:27:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:27:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-28 07:27:39,751 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 28 [2020-11-28 07:27:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:39,751 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-28 07:27:39,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:27:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-28 07:27:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 07:27:39,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:39,753 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1] [2020-11-28 07:27:39,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:39,954 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash -450269247, now seen corresponding path program 1 times [2020-11-28 07:27:39,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:39,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388502456] [2020-11-28 07:27:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-28 07:27:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388502456] [2020-11-28 07:27:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109765111] [2020-11-28 07:27:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-28 07:27:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:40,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 100 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229502196] [2020-11-28 07:27:41,779 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:27:41,780 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:41,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:41,780 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:41,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:42,232 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:42,397 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-11-28 07:27:43,008 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-28 07:27:43,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:43,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:43,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 29 [2020-11-28 07:27:43,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67558704] [2020-11-28 07:27:43,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-28 07:27:43,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-28 07:27:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2020-11-28 07:27:43,012 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 31 states. [2020-11-28 07:27:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:44,240 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-11-28 07:27:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-28 07:27:44,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2020-11-28 07:27:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:44,241 INFO L225 Difference]: With dead ends: 60 [2020-11-28 07:27:44,241 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 07:27:44,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=953, Invalid=2127, Unknown=0, NotChecked=0, Total=3080 [2020-11-28 07:27:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 07:27:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-28 07:27:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:27:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-11-28 07:27:44,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2020-11-28 07:27:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:44,248 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-11-28 07:27:44,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-28 07:27:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-11-28 07:27:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 07:27:44,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:44,250 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1] [2020-11-28 07:27:44,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-11-28 07:27:44,476 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:44,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1355532940, now seen corresponding path program 2 times [2020-11-28 07:27:44,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:44,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057609985] [2020-11-28 07:27:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:44,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057609985] [2020-11-28 07:27:44,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419621498] [2020-11-28 07:27:44,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:27:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:27:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:27:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:44,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 07:27:44,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319943011] [2020-11-28 07:27:44,758 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-28 07:27:44,759 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:44,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:44,760 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:44,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:45,290 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:45,799 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-28 07:27:45,980 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-28 07:27:45,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:45,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:45,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-11-28 07:27:45,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403936754] [2020-11-28 07:27:45,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:27:45,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:27:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:27:45,993 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2020-11-28 07:27:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:46,081 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-11-28 07:27:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:27:46,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-28 07:27:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:46,082 INFO L225 Difference]: With dead ends: 68 [2020-11-28 07:27:46,082 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 07:27:46,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:27:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 07:27:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-11-28 07:27:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 07:27:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-11-28 07:27:46,093 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2020-11-28 07:27:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:46,093 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-11-28 07:27:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:27:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-11-28 07:27:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 07:27:46,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:46,095 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2020-11-28 07:27:46,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:46,300 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash -928185916, now seen corresponding path program 2 times [2020-11-28 07:27:46,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:46,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46306196] [2020-11-28 07:27:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-11-28 07:27:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46306196] [2020-11-28 07:27:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115793307] [2020-11-28 07:27:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:46,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:27:46,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:27:46,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:27:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-11-28 07:27:46,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-11-28 07:27:47,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117212116] [2020-11-28 07:27:47,011 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:27:47,011 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:27:47,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:27:47,012 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:27:47,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:27:47,487 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:27:47,671 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-11-28 07:27:48,109 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-28 07:27:48,261 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-28 07:27:48,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:27:48,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:27:48,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-11-28 07:27:48,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58700839] [2020-11-28 07:27:48,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:27:48,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:27:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:27:48,265 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 13 states. [2020-11-28 07:27:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:48,417 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-11-28 07:27:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:27:48,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-28 07:27:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:48,418 INFO L225 Difference]: With dead ends: 59 [2020-11-28 07:27:48,419 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 07:27:48,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2020-11-28 07:27:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 07:27:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-28 07:27:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 07:27:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-28 07:27:48,424 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2020-11-28 07:27:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:48,424 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-28 07:27:48,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:27:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-28 07:27:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-28 07:27:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:48,426 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 1, 1, 1] [2020-11-28 07:27:48,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:48,637 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash -973914943, now seen corresponding path program 2 times [2020-11-28 07:27:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:48,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6001477] [2020-11-28 07:27:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-28 07:27:48,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6001477] [2020-11-28 07:27:48,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475670266] [2020-11-28 07:27:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:27:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:27:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 07:27:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-11-28 07:27:49,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-11-28 07:27:51,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:27:51,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 19 [2020-11-28 07:27:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856176237] [2020-11-28 07:27:51,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:27:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:27:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=302, Unknown=1, NotChecked=0, Total=420 [2020-11-28 07:27:51,040 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-11-28 07:27:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:51,307 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-28 07:27:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:27:51,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-28 07:27:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:51,309 INFO L225 Difference]: With dead ends: 58 [2020-11-28 07:27:51,309 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 07:27:51,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=160, Invalid=439, Unknown=1, NotChecked=0, Total=600 [2020-11-28 07:27:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 07:27:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-28 07:27:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 07:27:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-11-28 07:27:51,312 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 42 [2020-11-28 07:27:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:51,313 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-11-28 07:27:51,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:27:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-11-28 07:27:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-28 07:27:51,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:51,315 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1] [2020-11-28 07:27:51,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-11-28 07:27:51,524 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:27:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1385066996, now seen corresponding path program 3 times [2020-11-28 07:27:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:51,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68452064] [2020-11-28 07:27:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:27:51,576 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:27:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:27:51,714 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:27:51,740 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:27:51,740 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:27:51,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2020-11-28 07:27:51,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:27:51 BoogieIcfgContainer [2020-11-28 07:27:51,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:27:51,797 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:27:51,798 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:27:51,798 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:27:51,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:29" (3/4) ... [2020-11-28 07:27:51,800 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:27:51,860 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_be4d310d-f72f-459f-b0f0-a133589a7be3/bin/utaipan/witness.graphml [2020-11-28 07:27:51,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:27:51,862 INFO L168 Benchmark]: Toolchain (without parser) took 23534.56 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 71.6 MB in the beginning and 138.4 MB in the end (delta: -66.7 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,862 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 39.1 MB in the beginning and 39.1 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:27:51,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.54 ms. Allocated memory is still 100.7 MB. Free memory was 71.2 MB in the beginning and 79.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.85 ms. Allocated memory is still 100.7 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:27:51,863 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,864 INFO L168 Benchmark]: RCFGBuilder took 725.02 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 55.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,864 INFO L168 Benchmark]: TraceAbstraction took 22345.86 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 55.0 MB in the beginning and 141.5 MB in the end (delta: -86.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,865 INFO L168 Benchmark]: Witness Printer took 63.45 ms. Allocated memory is still 211.8 MB. Free memory was 141.5 MB in the beginning and 138.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:51,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 39.1 MB in the beginning and 39.1 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.54 ms. Allocated memory is still 100.7 MB. Free memory was 71.2 MB in the beginning and 79.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.85 ms. Allocated memory is still 100.7 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 725.02 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 55.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22345.86 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 55.0 MB in the beginning and 141.5 MB in the end (delta: -86.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. * Witness Printer took 63.45 ms. Allocated memory is still 211.8 MB. Free memory was 141.5 MB in the beginning and 138.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; [L5] int i = 0; VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i [L5] ++i VAL [array={11:0}] [L5] COND FALSE !(i < 10) [L9] return array; [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={11:0}] [L17] COND FALSE !(i < 10) [L21] return numbers2; [L21] return numbers2; [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.2s, OverallIterations: 18, TraceHistogramMax: 10, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 367 SDslu, 182 SDs, 0 SdLazy, 664 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 780 GetRequests, 564 SyntacticMatches, 13 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 654 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 817 ConstructedInterpolants, 76 QuantifiedInterpolants, 275136 SizeOfPredicates, 27 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 2381/2758 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 incorrect! Received shutdown request...