./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 20f541ceeb4d88c1ded29d751212bcde5b7dc0f0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:33:16,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:33:16,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:33:16,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:33:16,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:33:16,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:33:16,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:33:16,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:33:16,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:33:16,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:33:16,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:33:16,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:33:16,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:33:16,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:33:16,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:33:16,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:33:16,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:33:16,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:33:16,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:33:16,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:33:16,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:33:16,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:33:16,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:33:16,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:33:16,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:33:16,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:33:16,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:33:16,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:33:16,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:33:16,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:33:16,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:33:16,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:33:16,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:33:16,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:33:16,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:33:16,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:33:16,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:33:16,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:33:16,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:33:16,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:33:16,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:33:16,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 10:33:16,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:33:16,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:33:16,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:33:16,891 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:33:16,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:33:16,891 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:33:16,892 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:33:16,893 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:33:16,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:33:16,893 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:33:16,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 10:33:16,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 10:33:16,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:33:16,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:33:16,894 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 10:33:16,895 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 10:33:16,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:33:16,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:33:16,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:33:16,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:33:16,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:33:16,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:33:16,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:33:16,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:33:16,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:33:16,897 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:33:16,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:33:16,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:33:16,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:33:16,898 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_cfff5611-6644-4971-9459-6c586a499e85/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f541ceeb4d88c1ded29d751212bcde5b7dc0f0 [2020-12-09 10:33:17,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:33:17,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:33:17,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:33:17,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:33:17,109 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:33:17,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2020-12-09 10:33:17,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/data/296c98f9e/1893660085f842128f6cd590251f1321/FLAG6256d84ad [2020-12-09 10:33:17,569 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:33:17,570 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2020-12-09 10:33:17,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/data/296c98f9e/1893660085f842128f6cd590251f1321/FLAG6256d84ad [2020-12-09 10:33:17,591 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/data/296c98f9e/1893660085f842128f6cd590251f1321 [2020-12-09 10:33:17,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:33:17,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:33:17,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:33:17,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:33:17,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:33:17,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb8cf9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17, skipping insertion in model container [2020-12-09 10:33:17,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:33:17,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:33:17,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:33:17,847 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:33:17,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:33:17,910 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:33:17,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17 WrapperNode [2020-12-09 10:33:17,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:33:17,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:33:17,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:33:17,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:33:17,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:33:17,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:33:17,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:33:17,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:33:17,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... [2020-12-09 10:33:17,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:33:17,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:33:17,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:33:17,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:33:17,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:18,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 10:33:18,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 10:33:18,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:33:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:33:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:33:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:33:18,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:33:18,413 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 10:33:18,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:33:18 BoogieIcfgContainer [2020-12-09 10:33:18,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:33:18,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:33:18,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:33:18,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:33:18,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:33:17" (1/3) ... [2020-12-09 10:33:18,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cb22a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:33:18, skipping insertion in model container [2020-12-09 10:33:18,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:33:17" (2/3) ... [2020-12-09 10:33:18,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cb22a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:33:18, skipping insertion in model container [2020-12-09 10:33:18,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:33:18" (3/3) ... [2020-12-09 10:33:18,423 INFO L111 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2020-12-09 10:33:18,436 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:33:18,440 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-09 10:33:18,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-09 10:33:18,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:33:18,461 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 10:33:18,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:33:18,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:33:18,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:33:18,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:33:18,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:33:18,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:33:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-09 10:33:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 10:33:18,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:18,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 10:33:18,476 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash 155459, now seen corresponding path program 1 times [2020-12-09 10:33:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:18,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955992802] [2020-12-09 10:33:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955992802] [2020-12-09 10:33:18,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:18,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 10:33:18,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662271526] [2020-12-09 10:33:18,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:33:18,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:33:18,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:33:18,634 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-12-09 10:33:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:18,680 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-09 10:33:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:18,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 10:33:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:18,687 INFO L225 Difference]: With dead ends: 33 [2020-12-09 10:33:18,687 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 10:33:18,689 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 [2020-12-09 10:33:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 10:33:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 10:33:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 10:33:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-09 10:33:18,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2020-12-09 10:33:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:18,719 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-09 10:33:18,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:33:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-09 10:33:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 10:33:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:18,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 10:33:18,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:33:18,721 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash 155460, now seen corresponding path program 1 times [2020-12-09 10:33:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:18,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820469073] [2020-12-09 10:33:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:18,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820469073] [2020-12-09 10:33:18,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:18,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:33:18,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420985014] [2020-12-09 10:33:18,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:33:18,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:18,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:33:18,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:33:18,788 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-12-09 10:33:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:18,879 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-09 10:33:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:18,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 10:33:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:18,880 INFO L225 Difference]: With dead ends: 62 [2020-12-09 10:33:18,880 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 10:33:18,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:33:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 10:33:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 34. [2020-12-09 10:33:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 10:33:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-09 10:33:18,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 3 [2020-12-09 10:33:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:18,887 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-09 10:33:18,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:33:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-09 10:33:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 10:33:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:18,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 10:33:18,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:33:18,888 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 4917366, now seen corresponding path program 1 times [2020-12-09 10:33:18,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:18,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926250038] [2020-12-09 10:33:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926250038] [2020-12-09 10:33:19,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:19,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:33:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786147107] [2020-12-09 10:33:19,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:33:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:33:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:33:19,036 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2020-12-09 10:33:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:19,159 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-12-09 10:33:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:19,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 10:33:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:19,160 INFO L225 Difference]: With dead ends: 61 [2020-12-09 10:33:19,161 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 10:33:19,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:33:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 10:33:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-12-09 10:33:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 10:33:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-12-09 10:33:19,165 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 4 [2020-12-09 10:33:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:19,165 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-12-09 10:33:19,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:33:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-12-09 10:33:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 10:33:19,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:19,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 10:33:19,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 10:33:19,166 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash 4914907, now seen corresponding path program 1 times [2020-12-09 10:33:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:19,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273363141] [2020-12-09 10:33:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273363141] [2020-12-09 10:33:19,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:19,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 10:33:19,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237377919] [2020-12-09 10:33:19,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:33:19,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:33:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:33:19,188 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 3 states. [2020-12-09 10:33:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:19,217 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 10:33:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:19,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 10:33:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:19,218 INFO L225 Difference]: With dead ends: 35 [2020-12-09 10:33:19,218 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 10:33:19,219 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 [2020-12-09 10:33:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 10:33:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-09 10:33:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 10:33:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-09 10:33:19,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 4 [2020-12-09 10:33:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:19,223 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-09 10:33:19,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:33:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-09 10:33:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 10:33:19,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:19,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 10:33:19,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 10:33:19,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 4914908, now seen corresponding path program 1 times [2020-12-09 10:33:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:19,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289820807] [2020-12-09 10:33:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289820807] [2020-12-09 10:33:19,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:19,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:33:19,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729434583] [2020-12-09 10:33:19,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:33:19,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:19,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:33:19,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:33:19,271 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2020-12-09 10:33:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:19,337 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-12-09 10:33:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:33:19,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 10:33:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:19,338 INFO L225 Difference]: With dead ends: 63 [2020-12-09 10:33:19,338 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 10:33:19,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:33:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 10:33:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2020-12-09 10:33:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 10:33:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-09 10:33:19,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 4 [2020-12-09 10:33:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:19,341 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-09 10:33:19,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:33:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-09 10:33:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 10:33:19,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:19,342 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 10:33:19,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 10:33:19,342 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 149484289, now seen corresponding path program 1 times [2020-12-09 10:33:19,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:19,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615227372] [2020-12-09 10:33:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615227372] [2020-12-09 10:33:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369374858] [2020-12-09 10:33:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:19,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 10:33:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:19,466 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_46|], 2=[|v_#valid_72|]} [2020-12-09 10:33:19,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 10:33:19,478 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 10:33:19,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 10:33:19,487 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:33:19,492 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2020-12-09 10:33:19,497 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 10:33:19,513 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-09 10:33:19,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 10:33:19,515 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:12 [2020-12-09 10:33:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:19,571 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 10:33:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958556178] [2020-12-09 10:33:19,617 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 10:33:19,617 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:19,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:19,627 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:19,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:19,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:19,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:20,116 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:20,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:33:20,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:20,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-12-09 10:33:20,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823738941] [2020-12-09 10:33:20,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 10:33:20,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 10:33:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-09 10:33:20,437 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 9 states. [2020-12-09 10:33:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:20,618 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-12-09 10:33:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:33:20,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-12-09 10:33:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:20,619 INFO L225 Difference]: With dead ends: 88 [2020-12-09 10:33:20,620 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 10:33:20,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 10:33:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 10:33:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2020-12-09 10:33:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 10:33:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-09 10:33:20,624 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 5 [2020-12-09 10:33:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:20,625 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-09 10:33:20,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 10:33:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-09 10:33:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 10:33:20,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:20,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 10:33:20,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 10:33:20,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 152438340, now seen corresponding path program 1 times [2020-12-09 10:33:20,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:20,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733767262] [2020-12-09 10:33:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:20,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733767262] [2020-12-09 10:33:20,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:20,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 10:33:20,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357487296] [2020-12-09 10:33:20,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:33:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:33:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:33:20,963 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 3 states. [2020-12-09 10:33:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:21,012 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-12-09 10:33:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:21,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 10:33:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:21,013 INFO L225 Difference]: With dead ends: 38 [2020-12-09 10:33:21,013 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 10:33:21,014 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 [2020-12-09 10:33:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 10:33:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 10:33:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 10:33:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-09 10:33:21,016 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 5 [2020-12-09 10:33:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:21,017 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-09 10:33:21,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:33:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-09 10:33:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:33:21,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:21,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:33:21,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-09 10:33:21,017 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:21,018 INFO L82 PathProgramCache]: Analyzing trace with hash 339143769, now seen corresponding path program 1 times [2020-12-09 10:33:21,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:21,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213496729] [2020-12-09 10:33:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213496729] [2020-12-09 10:33:21,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494055201] [2020-12-09 10:33:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 10:33:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 10:33:21,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2020-12-09 10:33:21,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555501741] [2020-12-09 10:33:21,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:33:21,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:33:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:33:21,178 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2020-12-09 10:33:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:21,202 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-09 10:33:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:21,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 10:33:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:21,203 INFO L225 Difference]: With dead ends: 37 [2020-12-09 10:33:21,203 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 10:33:21,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:33:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 10:33:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-12-09 10:33:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 10:33:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 10:33:21,205 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2020-12-09 10:33:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:21,205 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 10:33:21,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:33:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 10:33:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:33:21,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:21,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:33:21,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:33:21,408 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash 430623137, now seen corresponding path program 1 times [2020-12-09 10:33:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:21,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017430993] [2020-12-09 10:33:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017430993] [2020-12-09 10:33:21,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:21,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:33:21,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282693534] [2020-12-09 10:33:21,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:33:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:33:21,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:33:21,556 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-12-09 10:33:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:21,619 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-12-09 10:33:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:21,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 10:33:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:21,620 INFO L225 Difference]: With dead ends: 46 [2020-12-09 10:33:21,620 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 10:33:21,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:33:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 10:33:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-12-09 10:33:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 10:33:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-09 10:33:21,622 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 6 [2020-12-09 10:33:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:21,622 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-09 10:33:21,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:33:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-09 10:33:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:33:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:21,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:33:21,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-09 10:33:21,623 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash 430623136, now seen corresponding path program 1 times [2020-12-09 10:33:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:21,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971593864] [2020-12-09 10:33:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971593864] [2020-12-09 10:33:21,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:21,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:33:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350566925] [2020-12-09 10:33:21,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:33:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:33:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:33:21,641 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 4 states. [2020-12-09 10:33:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:21,666 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-09 10:33:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:21,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 10:33:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:21,667 INFO L225 Difference]: With dead ends: 32 [2020-12-09 10:33:21,667 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 10:33:21,667 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 [2020-12-09 10:33:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 10:33:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 10:33:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 10:33:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-09 10:33:21,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 6 [2020-12-09 10:33:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:21,669 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-09 10:33:21,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:33:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-09 10:33:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:33:21,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:21,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-12-09 10:33:21,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-09 10:33:21,670 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash 428332682, now seen corresponding path program 1 times [2020-12-09 10:33:21,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:21,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82604818] [2020-12-09 10:33:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82604818] [2020-12-09 10:33:21,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137045821] [2020-12-09 10:33:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 10:33:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:21,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557975873] [2020-12-09 10:33:21,840 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 10:33:21,840 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:21,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:21,840 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:21,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:22,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:22,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:22,196 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:22,488 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-09 10:33:22,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:33:22,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:22,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-12-09 10:33:22,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126612320] [2020-12-09 10:33:22,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 10:33:22,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:22,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 10:33:22,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-09 10:33:22,681 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 11 states. [2020-12-09 10:33:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:22,821 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-12-09 10:33:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 10:33:22,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-12-09 10:33:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:22,823 INFO L225 Difference]: With dead ends: 80 [2020-12-09 10:33:22,823 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 10:33:22,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-12-09 10:33:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 10:33:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2020-12-09 10:33:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 10:33:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-09 10:33:22,826 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 6 [2020-12-09 10:33:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:22,826 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-09 10:33:22,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 10:33:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-09 10:33:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:33:22,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:22,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-09 10:33:23,028 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1512028313, now seen corresponding path program 1 times [2020-12-09 10:33:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039611460] [2020-12-09 10:33:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039611460] [2020-12-09 10:33:23,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:23,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:33:23,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442154117] [2020-12-09 10:33:23,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:33:23,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:33:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:33:23,078 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2020-12-09 10:33:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:23,096 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-09 10:33:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:23,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 10:33:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:23,097 INFO L225 Difference]: With dead ends: 26 [2020-12-09 10:33:23,097 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 10:33:23,097 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 [2020-12-09 10:33:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 10:33:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 10:33:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 10:33:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-09 10:33:23,099 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 8 [2020-12-09 10:33:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:23,099 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-09 10:33:23,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:33:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-09 10:33:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:33:23,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:23,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-12-09 10:33:23,100 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1512028314, now seen corresponding path program 1 times [2020-12-09 10:33:23,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091164362] [2020-12-09 10:33:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091164362] [2020-12-09 10:33:23,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:23,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:33:23,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199201074] [2020-12-09 10:33:23,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:33:23,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:33:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:33:23,129 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-09 10:33:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:23,167 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 10:33:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:23,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 10:33:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:23,168 INFO L225 Difference]: With dead ends: 30 [2020-12-09 10:33:23,168 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 10:33:23,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:33:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 10:33:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-09 10:33:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 10:33:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 10:33:23,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 8 [2020-12-09 10:33:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:23,170 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 10:33:23,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:33:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 10:33:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 10:33:23,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:23,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-12-09 10:33:23,171 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1360453224, now seen corresponding path program 1 times [2020-12-09 10:33:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401877960] [2020-12-09 10:33:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401877960] [2020-12-09 10:33:23,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:23,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:33:23,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187308007] [2020-12-09 10:33:23,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:33:23,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:33:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:33:23,219 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-12-09 10:33:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:23,237 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-09 10:33:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:33:23,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 10:33:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:23,238 INFO L225 Difference]: With dead ends: 27 [2020-12-09 10:33:23,238 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 10:33:23,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:33:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 10:33:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 10:33:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 10:33:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 10:33:23,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2020-12-09 10:33:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 10:33:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:33:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 10:33:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 10:33:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:23,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-12-09 10:33:23,241 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash -775606801, now seen corresponding path program 1 times [2020-12-09 10:33:23,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290539997] [2020-12-09 10:33:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290539997] [2020-12-09 10:33:23,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:23,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:33:23,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574082297] [2020-12-09 10:33:23,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:33:23,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:33:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:33:23,255 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-12-09 10:33:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:23,261 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-12-09 10:33:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:33:23,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 10:33:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:23,262 INFO L225 Difference]: With dead ends: 27 [2020-12-09 10:33:23,262 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 10:33:23,262 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 [2020-12-09 10:33:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 10:33:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 10:33:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 10:33:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-09 10:33:23,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2020-12-09 10:33:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:23,264 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-09 10:33:23,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:33:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-09 10:33:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:33:23,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:23,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-12-09 10:33:23,265 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1584616672, now seen corresponding path program 1 times [2020-12-09 10:33:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852592105] [2020-12-09 10:33:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852592105] [2020-12-09 10:33:23,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:33:23,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 10:33:23,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715658026] [2020-12-09 10:33:23,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 10:33:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 10:33:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:33:23,353 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2020-12-09 10:33:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:23,471 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 10:33:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 10:33:23,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 10:33:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:23,472 INFO L225 Difference]: With dead ends: 34 [2020-12-09 10:33:23,472 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 10:33:23,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-09 10:33:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 10:33:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-09 10:33:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 10:33:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-09 10:33:23,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 12 [2020-12-09 10:33:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:23,473 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-09 10:33:23,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 10:33:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-09 10:33:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 10:33:23,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:23,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:23,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-12-09 10:33:23,474 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2121967043, now seen corresponding path program 1 times [2020-12-09 10:33:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78467035] [2020-12-09 10:33:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78467035] [2020-12-09 10:33:23,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324589704] [2020-12-09 10:33:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 10:33:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:23,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709684746] [2020-12-09 10:33:23,733 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 10:33:23,733 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:23,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:23,734 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:23,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:23,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:24,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:24,175 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:24,853 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-09 10:33:25,136 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-12-09 10:33:25,419 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-12-09 10:33:25,723 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-12-09 10:33:25,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:25,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 6] total 23 [2020-12-09 10:33:25,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307947580] [2020-12-09 10:33:25,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 10:33:25,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 10:33:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-12-09 10:33:25,728 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2020-12-09 10:33:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:25,807 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-09 10:33:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 10:33:25,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-09 10:33:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:25,807 INFO L225 Difference]: With dead ends: 35 [2020-12-09 10:33:25,807 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 10:33:25,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-12-09 10:33:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 10:33:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-09 10:33:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 10:33:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-09 10:33:25,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 14 [2020-12-09 10:33:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:25,809 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-09 10:33:25,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 10:33:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-09 10:33:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 10:33:25,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:25,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:26,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:33:26,011 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -152878415, now seen corresponding path program 1 times [2020-12-09 10:33:26,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:26,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728466438] [2020-12-09 10:33:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:26,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728466438] [2020-12-09 10:33:26,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667395128] [2020-12-09 10:33:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 10:33:26,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:26,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295709598] [2020-12-09 10:33:26,259 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:33:26,259 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:26,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:26,259 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:26,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:26,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:26,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:26,912 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:27,094 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-09 10:33:27,837 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:33:28,079 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:33:28,330 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:33:28,481 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:33:28,734 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:33:28,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:33:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2020-12-09 10:33:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952199299] [2020-12-09 10:33:28,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 10:33:28,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 10:33:28,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-12-09 10:33:28,736 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 15 states. [2020-12-09 10:33:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:28,904 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 10:33:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 10:33:28,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-12-09 10:33:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:28,904 INFO L225 Difference]: With dead ends: 39 [2020-12-09 10:33:28,904 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 10:33:28,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-12-09 10:33:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 10:33:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-12-09 10:33:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 10:33:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-09 10:33:28,906 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2020-12-09 10:33:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:28,906 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-09 10:33:28,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 10:33:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-09 10:33:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 10:33:28,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:28,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:29,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:33:29,109 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash -887214678, now seen corresponding path program 1 times [2020-12-09 10:33:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:29,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141410725] [2020-12-09 10:33:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:29,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141410725] [2020-12-09 10:33:29,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898656300] [2020-12-09 10:33:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 10:33:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:29,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737960812] [2020-12-09 10:33:29,347 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:33:29,348 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:29,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:29,348 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:29,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:29,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:29,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:29,974 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:30,191 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 10:33:30,863 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:33:31,097 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:33:31,334 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:33:31,472 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:33:31,699 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:33:31,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:33:31,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:31,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2020-12-09 10:33:31,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131963934] [2020-12-09 10:33:31,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 10:33:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 10:33:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-12-09 10:33:31,701 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 15 states. [2020-12-09 10:33:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:31,823 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 10:33:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 10:33:31,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-09 10:33:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:31,824 INFO L225 Difference]: With dead ends: 36 [2020-12-09 10:33:31,824 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 10:33:31,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2020-12-09 10:33:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 10:33:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-09 10:33:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 10:33:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-09 10:33:31,825 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2020-12-09 10:33:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:31,826 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-09 10:33:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 10:33:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-09 10:33:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 10:33:31,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:31,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:32,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:33:32,028 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1844395536, now seen corresponding path program 2 times [2020-12-09 10:33:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:32,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277882856] [2020-12-09 10:33:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277882856] [2020-12-09 10:33:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202143698] [2020-12-09 10:33:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 10:33:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:33:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-09 10:33:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:34,296 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 10:33:34,695 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-12-09 10:33:35,065 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-12-09 10:33:35,594 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 183 [2020-12-09 10:33:36,065 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 179 [2020-12-09 10:33:36,503 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 173 [2020-12-09 10:33:36,940 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 169 [2020-12-09 10:33:37,367 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 163 [2020-12-09 10:33:37,516 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-12-09 10:33:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:37,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:38,353 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-12-09 10:33:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:33:38,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174481689] [2020-12-09 10:33:38,874 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:33:38,874 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:38,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:38,874 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:38,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:39,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:39,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:39,539 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:39,745 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-09 10:33:40,659 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:33:40,932 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:33:41,209 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:33:41,414 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:33:41,715 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:33:41,716 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:33:41,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:33:41,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 37 [2020-12-09 10:33:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415445631] [2020-12-09 10:33:41,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-09 10:33:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:33:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-09 10:33:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2020-12-09 10:33:41,718 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 39 states. [2020-12-09 10:33:42,018 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-09 10:33:44,066 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 124 DAG size of output: 96 [2020-12-09 10:33:44,290 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-12-09 10:33:44,665 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-12-09 10:33:45,434 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2020-12-09 10:33:47,175 WARN L197 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 192 DAG size of output: 107 [2020-12-09 10:33:47,519 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2020-12-09 10:33:47,800 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 108 [2020-12-09 10:33:49,422 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 189 DAG size of output: 111 [2020-12-09 10:33:51,683 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 171 DAG size of output: 143 [2020-12-09 10:33:52,118 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 112 [2020-12-09 10:33:54,971 WARN L197 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-12-09 10:33:55,296 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2020-12-09 10:33:55,783 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2020-12-09 10:33:55,944 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-12-09 10:33:56,274 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-12-09 10:33:56,700 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2020-12-09 10:33:56,939 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-09 10:33:57,325 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-12-09 10:33:57,827 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-12-09 10:33:57,996 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-09 10:33:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:33:58,225 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-12-09 10:33:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-09 10:33:58,225 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 22 [2020-12-09 10:33:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:33:58,226 INFO L225 Difference]: With dead ends: 99 [2020-12-09 10:33:58,226 INFO L226 Difference]: Without dead ends: 99 [2020-12-09 10:33:58,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1278, Invalid=6378, Unknown=0, NotChecked=0, Total=7656 [2020-12-09 10:33:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-09 10:33:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2020-12-09 10:33:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 10:33:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-09 10:33:58,229 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-12-09 10:33:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:33:58,230 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-09 10:33:58,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-09 10:33:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-09 10:33:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 10:33:58,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:33:58,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:33:58,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-12-09 10:33:58,432 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:33:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:33:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1357437225, now seen corresponding path program 2 times [2020-12-09 10:33:58,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:33:58,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489342792] [2020-12-09 10:33:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:33:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:33:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:58,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489342792] [2020-12-09 10:33:58,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303850339] [2020-12-09 10:33:58,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:33:58,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 10:33:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:33:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 10:33:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:33:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:58,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:33:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:33:58,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356273805] [2020-12-09 10:33:58,849 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:33:58,849 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:33:58,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:33:58,850 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:33:58,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:33:59,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:59,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:33:59,500 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:33:59,749 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 10:34:00,528 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:34:00,797 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:34:01,055 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:34:01,222 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:34:01,484 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:34:01,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:34:01,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:34:01,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2020-12-09 10:34:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500336356] [2020-12-09 10:34:01,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 10:34:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:34:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 10:34:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 10:34:01,486 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 21 states. [2020-12-09 10:34:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:34:01,703 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-09 10:34:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 10:34:01,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-09 10:34:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:34:01,704 INFO L225 Difference]: With dead ends: 65 [2020-12-09 10:34:01,704 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 10:34:01,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 10:34:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 10:34:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-12-09 10:34:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 10:34:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-09 10:34:01,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2020-12-09 10:34:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:34:01,706 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-09 10:34:01,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 10:34:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-09 10:34:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 10:34:01,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:34:01,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:34:01,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-12-09 10:34:01,908 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:34:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:34:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash 819766423, now seen corresponding path program 3 times [2020-12-09 10:34:01,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:34:01,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983199958] [2020-12-09 10:34:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:34:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:34:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:34:02,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983199958] [2020-12-09 10:34:02,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674621945] [2020-12-09 10:34:02,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:34:02,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 10:34:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:34:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 10:34:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:34:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:34:02,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:34:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:34:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159717612] [2020-12-09 10:34:02,326 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:34:02,326 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:34:02,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:34:02,326 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:34:02,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:34:02,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:02,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:02,925 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:34:03,176 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 10:34:03,946 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:34:04,207 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:34:04,469 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:34:04,647 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:34:04,914 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:34:04,915 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:34:04,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:34:04,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2020-12-09 10:34:04,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633789423] [2020-12-09 10:34:04,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 10:34:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:34:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 10:34:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 10:34:04,916 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 24 states. [2020-12-09 10:34:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:34:05,074 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-09 10:34:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 10:34:05,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-09 10:34:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:34:05,075 INFO L225 Difference]: With dead ends: 42 [2020-12-09 10:34:05,075 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 10:34:05,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 10:34:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 10:34:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-09 10:34:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 10:34:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-09 10:34:05,077 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2020-12-09 10:34:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:34:05,077 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-09 10:34:05,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 10:34:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-09 10:34:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 10:34:05,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:34:05,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:34:05,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:34:05,279 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:34:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:34:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1957689949, now seen corresponding path program 3 times [2020-12-09 10:34:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:34:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884256175] [2020-12-09 10:34:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:34:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:34:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 10:34:05,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884256175] [2020-12-09 10:34:05,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213807096] [2020-12-09 10:34:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:34:05,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 10:34:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:34:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 10:34:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:34:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:34:06,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:34:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:34:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616467194] [2020-12-09 10:34:06,308 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:34:06,308 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:34:06,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:34:06,309 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:34:06,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:34:06,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:06,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:06,947 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:34:07,157 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-09 10:34:07,996 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:34:08,270 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:34:08,528 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:34:08,707 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:34:08,990 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:34:08,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:34:08,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:34:08,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2020-12-09 10:34:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348870197] [2020-12-09 10:34:08,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 10:34:08,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:34:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 10:34:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2020-12-09 10:34:08,993 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 31 states. [2020-12-09 10:34:10,040 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-09 10:34:10,480 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-09 10:34:10,830 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-09 10:34:11,205 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-09 10:34:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:34:11,276 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-12-09 10:34:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-09 10:34:11,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2020-12-09 10:34:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:34:11,277 INFO L225 Difference]: With dead ends: 114 [2020-12-09 10:34:11,277 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 10:34:11,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=784, Invalid=4472, Unknown=0, NotChecked=0, Total=5256 [2020-12-09 10:34:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 10:34:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-12-09 10:34:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 10:34:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-12-09 10:34:11,280 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 30 [2020-12-09 10:34:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:34:11,280 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-12-09 10:34:11,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 10:34:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-12-09 10:34:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 10:34:11,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:34:11,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 10:34:11,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2020-12-09 10:34:11,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:34:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:34:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1831730350, now seen corresponding path program 4 times [2020-12-09 10:34:11,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:34:11,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174811549] [2020-12-09 10:34:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:34:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:34:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:34:11,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174811549] [2020-12-09 10:34:11,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127199416] [2020-12-09 10:34:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/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 [2020-12-09 10:34:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:34:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 10:34:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:34:18,830 WARN L197 SmtUtils]: Spent 6.15 s on a formula simplification that was a NOOP. DAG size: 85 [2020-12-09 10:34:19,252 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-12-09 10:34:19,428 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-12-09 10:34:19,599 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-12-09 10:34:19,780 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-12-09 10:34:19,987 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-12-09 10:34:20,186 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-12-09 10:34:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 10:34:20,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:34:24,885 WARN L197 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 78 [2020-12-09 10:34:25,101 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-09 10:34:25,451 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-12-09 10:34:25,682 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-12-09 10:34:25,839 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-12-09 10:34:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 10:34:25,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163112083] [2020-12-09 10:34:25,972 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:34:25,972 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:34:25,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:34:25,973 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:34:25,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:34:26,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:26,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:34:26,621 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:34:26,860 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-09 10:34:27,901 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:34:28,219 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:34:28,520 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:34:28,729 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:34:29,038 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:34:29,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:34:29,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:34:29,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 37 [2020-12-09 10:34:29,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807419640] [2020-12-09 10:34:29,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-09 10:34:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:34:29,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-09 10:34:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2020-12-09 10:34:29,041 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 39 states. [2020-12-09 10:34:36,234 WARN L197 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-09 10:34:43,400 WARN L197 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 131 DAG size of output: 128 [2020-12-09 10:34:53,202 WARN L197 SmtUtils]: Spent 9.65 s on a formula simplification. DAG size of input: 152 DAG size of output: 129 [2020-12-09 10:35:00,998 WARN L197 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 132 DAG size of output: 115 [2020-12-09 10:35:04,340 WARN L197 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2020-12-09 10:35:16,493 WARN L197 SmtUtils]: Spent 11.88 s on a formula simplification. DAG size of input: 133 DAG size of output: 111 [2020-12-09 10:35:17,585 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 118 DAG size of output: 60 [2020-12-09 10:35:28,966 WARN L197 SmtUtils]: Spent 11.14 s on a formula simplification. DAG size of input: 136 DAG size of output: 114 [2020-12-09 10:35:29,281 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-12-09 10:35:38,303 WARN L197 SmtUtils]: Spent 8.94 s on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2020-12-09 10:35:39,222 WARN L197 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-12-09 10:35:43,137 WARN L197 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2020-12-09 10:35:43,444 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 60 [2020-12-09 10:35:56,807 WARN L197 SmtUtils]: Spent 13.27 s on a formula simplification. DAG size of input: 113 DAG size of output: 104 [2020-12-09 10:36:01,058 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2020-12-09 10:36:01,230 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2020-12-09 10:36:13,525 WARN L197 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2020-12-09 10:36:13,732 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2020-12-09 10:36:13,951 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2020-12-09 10:36:26,161 WARN L197 SmtUtils]: Spent 12.15 s on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-12-09 10:36:26,352 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 65 [2020-12-09 10:36:26,608 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-09 10:36:26,848 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2020-12-09 10:36:27,053 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 96 [2020-12-09 10:36:27,273 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2020-12-09 10:36:39,929 WARN L197 SmtUtils]: Spent 12.59 s on a formula simplification. DAG size of input: 122 DAG size of output: 107 [2020-12-09 10:36:40,153 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-12-09 10:36:40,412 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2020-12-09 10:36:52,666 WARN L197 SmtUtils]: Spent 12.19 s on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-12-09 10:37:04,262 WARN L197 SmtUtils]: Spent 11.51 s on a formula simplification. DAG size of input: 121 DAG size of output: 106 [2020-12-09 10:37:04,510 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2020-12-09 10:37:04,763 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2020-12-09 10:37:09,035 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-12-09 10:37:21,325 WARN L197 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-12-09 10:37:21,601 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-12-09 10:37:25,865 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-12-09 10:37:30,158 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-12-09 10:37:34,589 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-12-09 10:37:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:37:35,481 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-12-09 10:37:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-09 10:37:35,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 34 [2020-12-09 10:37:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:37:35,482 INFO L225 Difference]: With dead ends: 146 [2020-12-09 10:37:35,482 INFO L226 Difference]: Without dead ends: 146 [2020-12-09 10:37:35,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 54 SyntacticMatches, 12 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3993 ImplicationChecksByTransitivity, 199.8s TimeCoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2020-12-09 10:37:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-09 10:37:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 81. [2020-12-09 10:37:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 10:37:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-12-09 10:37:35,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-12-09 10:37:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:37:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-12-09 10:37:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-09 10:37:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-12-09 10:37:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 10:37:35,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:37:35,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:37:35,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2020-12-09 10:37:35,690 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:37:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:37:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1056712644, now seen corresponding path program 4 times [2020-12-09 10:37:35,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:37:35,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037931463] [2020-12-09 10:37:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:37:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:37:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:37:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037931463] [2020-12-09 10:37:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705137695] [2020-12-09 10:37:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:37:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:37:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 10:37:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:37:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:37:35,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:37:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:37:36,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736229981] [2020-12-09 10:37:36,114 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:37:36,114 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:37:36,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:37:36,114 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:37:36,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:37:36,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:36,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:36,797 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:37:37,074 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 10:37:37,953 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:37:38,283 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:37:38,571 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:37:38,740 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:37:39,013 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:37:39,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:37:39,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:37:39,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2020-12-09 10:37:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432370753] [2020-12-09 10:37:39,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 10:37:39,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:37:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 10:37:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 10:37:39,015 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 22 states. [2020-12-09 10:37:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:37:39,288 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-12-09 10:37:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 10:37:39,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-12-09 10:37:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:37:39,289 INFO L225 Difference]: With dead ends: 92 [2020-12-09 10:37:39,289 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 10:37:39,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 10:37:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 10:37:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-09 10:37:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 10:37:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-12-09 10:37:39,292 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 34 [2020-12-09 10:37:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:37:39,292 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-12-09 10:37:39,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 10:37:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-12-09 10:37:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 10:37:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:37:39,293 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:37:39,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2020-12-09 10:37:39,495 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:37:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:37:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -532326461, now seen corresponding path program 5 times [2020-12-09 10:37:39,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:37:39,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392794024] [2020-12-09 10:37:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:37:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:37:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:37:39,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392794024] [2020-12-09 10:37:39,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286154549] [2020-12-09 10:37:39,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:37:39,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 10:37:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:37:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-09 10:37:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:37:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 10:37:39,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:37:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 10:37:40,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085172322] [2020-12-09 10:37:40,224 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:37:40,224 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:37:40,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:37:40,224 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:37:40,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:37:40,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:40,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:40,893 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:37:41,197 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-12-09 10:37:42,189 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:37:42,531 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:37:42,847 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:37:43,057 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:37:43,377 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:37:43,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:37:43,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:37:43,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2020-12-09 10:37:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860474622] [2020-12-09 10:37:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 10:37:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:37:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 10:37:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 10:37:43,380 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 24 states. [2020-12-09 10:37:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:37:44,497 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-12-09 10:37:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-09 10:37:44,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-12-09 10:37:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:37:44,498 INFO L225 Difference]: With dead ends: 139 [2020-12-09 10:37:44,498 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 10:37:44,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2020-12-09 10:37:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 10:37:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-09 10:37:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 10:37:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-09 10:37:44,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 40 [2020-12-09 10:37:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:37:44,500 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-09 10:37:44,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 10:37:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-09 10:37:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-09 10:37:44,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:37:44,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 10:37:44,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable692 [2020-12-09 10:37:44,703 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 10:37:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:37:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1983010842, now seen corresponding path program 5 times [2020-12-09 10:37:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:37:44,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047522179] [2020-12-09 10:37:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:37:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:37:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 10:37:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047522179] [2020-12-09 10:37:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733690272] [2020-12-09 10:37:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:37:45,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 10:37:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:37:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 10:37:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:37:47,337 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 10:37:47,661 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-09 10:37:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-09 10:37:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:37:48,492 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-09 10:37:50,793 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2020-12-09 10:37:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-09 10:37:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922695169] [2020-12-09 10:37:51,674 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 10:37:51,674 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:37:51,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:37:51,674 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:37:51,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:37:51,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:51,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:37:52,365 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:37:52,620 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-09 10:37:53,628 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-09 10:37:53,989 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-09 10:37:54,319 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-09 10:37:54,575 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 10:37:54,911 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-09 10:37:54,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:37:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:37:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 11] total 32 [2020-12-09 10:37:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285107983] [2020-12-09 10:37:54,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-09 10:37:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:37:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-09 10:37:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 10:37:54,915 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 33 states. [2020-12-09 10:37:57,410 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 10:38:01,566 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-09 10:38:05,718 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-09 10:38:19,937 WARN L197 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-09 10:38:22,151 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 57 [2020-12-09 10:38:24,374 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 60 [2020-12-09 10:38:28,793 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-09 10:38:30,891 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 55 [2020-12-09 10:38:35,095 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-09 10:38:39,325 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-09 10:38:54,092 WARN L197 SmtUtils]: Spent 12.18 s on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-09 10:38:56,181 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-09 10:38:58,289 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-09 10:39:00,391 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 55 [2020-12-09 10:39:04,549 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-09 10:39:08,719 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-09 10:39:19,267 WARN L197 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-09 10:39:21,353 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-09 10:39:23,450 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-09 10:39:25,543 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 10:39:29,682 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-09 10:39:33,833 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-09 10:39:52,281 WARN L197 SmtUtils]: Spent 12.37 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-09 10:39:54,365 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 57 [2020-12-09 10:39:56,475 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 60 [2020-12-09 10:39:58,574 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-09 10:40:02,722 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-09 10:40:08,900 WARN L197 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-09 10:40:15,118 WARN L197 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-09 10:40:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:40:15,119 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-09 10:40:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-09 10:40:15,119 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2020-12-09 10:40:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:40:15,119 INFO L225 Difference]: With dead ends: 81 [2020-12-09 10:40:15,119 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:40:15,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 148.1s TimeCoverageRelationStatistics Valid=1265, Invalid=6745, Unknown=0, NotChecked=0, Total=8010 [2020-12-09 10:40:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:40:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:40:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:40:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:40:15,122 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-12-09 10:40:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:40:15,122 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:40:15,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-09 10:40:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:40:15,122 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:40:15,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable763,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:40:15,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:40:15 BoogieIcfgContainer [2020-12-09 10:40:15,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:40:15,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:40:15,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:40:15,337 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:40:15,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:33:18" (3/4) ... [2020-12-09 10:40:15,342 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:40:15,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2020-12-09 10:40:15,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 10:40:15,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 10:40:15,375 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cfff5611-6644-4971-9459-6c586a499e85/bin/utaipan/witness.graphml [2020-12-09 10:40:15,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:40:15,376 INFO L168 Benchmark]: Toolchain (without parser) took 417781.56 ms. Allocated memory was 117.4 MB in the beginning and 226.5 MB in the end (delta: 109.1 MB). Free memory was 79.4 MB in the beginning and 113.8 MB in the end (delta: -34.4 MB). Peak memory consumption was 74.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,376 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 117.4 MB. Free memory is still 96.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:40:15,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.91 ms. Allocated memory is still 117.4 MB. Free memory was 79.1 MB in the beginning and 82.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.47 ms. Allocated memory is still 117.4 MB. Free memory was 82.2 MB in the beginning and 80.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,376 INFO L168 Benchmark]: Boogie Preprocessor took 20.56 ms. Allocated memory is still 117.4 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,376 INFO L168 Benchmark]: RCFGBuilder took 450.78 ms. Allocated memory is still 117.4 MB. Free memory was 79.1 MB in the beginning and 91.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,377 INFO L168 Benchmark]: TraceAbstraction took 416918.14 ms. Allocated memory was 117.4 MB in the beginning and 226.5 MB in the end (delta: 109.1 MB). Free memory was 90.8 MB in the beginning and 117.4 MB in the end (delta: -26.5 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,377 INFO L168 Benchmark]: Witness Printer took 38.99 ms. Allocated memory is still 226.5 MB. Free memory was 117.4 MB in the beginning and 113.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:15,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 117.4 MB. Free memory is still 96.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.91 ms. Allocated memory is still 117.4 MB. Free memory was 79.1 MB in the beginning and 82.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.47 ms. Allocated memory is still 117.4 MB. Free memory was 82.2 MB in the beginning and 80.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.56 ms. Allocated memory is still 117.4 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 450.78 ms. Allocated memory is still 117.4 MB. Free memory was 79.1 MB in the beginning and 91.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 416918.14 ms. Allocated memory was 117.4 MB in the beginning and 226.5 MB in the end (delta: 109.1 MB). Free memory was 90.8 MB in the beginning and 117.4 MB in the end (delta: -26.5 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. * Witness Printer took 38.99 ms. Allocated memory is still 226.5 MB. Free memory was 117.4 MB in the beginning and 113.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 416.8s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 348.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 356 SDtfs, 3104 SDslu, 964 SDs, 0 SdLazy, 4243 SolverSat, 757 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1324 GetRequests, 608 SyntacticMatches, 38 SemanticMatches, 678 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 13287 ImplicationChecksByTransitivity, 391.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 27 MinimizatonAttempts, 344 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 32.1s InterpolantComputationTime, 730 NumberOfCodeBlocks, 730 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 998 ConstructedInterpolants, 173 QuantifiedInterpolants, 676942 SizeOfPredicates, 242 NumberOfNonLiveVariables, 2224 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 55 InterpolantComputations, 14 PerfectInterpolantSequences, 330/890 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: OVERALL_TIME[ms]: 442, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME[ms]: 355, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME[ms]: 351, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 221, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 38, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 34, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 21, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 3, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 16, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 84, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 84, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 1, DAG_COMPRESSION_TIME[ms]: 7, DAG_COMPRESSION_PROCESSED_NODES: 286, DAG_COMPRESSION_RETAINED_NODES: 40, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...