./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI --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 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:22:30,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:30,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:30,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:30,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:30,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:30,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:30,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:30,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:30,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:30,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:30,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:30,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:30,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:30,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:30,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:30,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:30,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:30,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:30,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:30,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:30,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:30,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:30,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:30,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:30,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:30,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:30,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:30,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:30,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:30,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:30,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:30,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:30,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:30,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:30,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:30,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:30,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:30,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:30,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:30,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:30,468 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2021-10-11 02:22:30,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:30,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:30,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:30,512 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:30,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:30,513 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:30,513 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:30,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:30,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:30,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:30,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:30,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:30,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:30,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:30,514 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:30,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:22:30,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:22:30,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:30,516 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:22:30,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:30,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:30,519 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:22:30,519 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:22:30,520 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:22:30,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:30,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:30,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:30,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:30,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:30,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:30,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:30,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:30,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:30,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:30,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:30,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:30,523 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_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2021-10-11 02:22:30,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:30,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:30,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:30,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:30,819 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:30,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-10-11 02:22:30,896 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/data/0cafaaefb/b0b214af5e1540b3bd927338f97156bc/FLAG7e078de0e [2021-10-11 02:22:31,370 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:31,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-10-11 02:22:31,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/data/0cafaaefb/b0b214af5e1540b3bd927338f97156bc/FLAG7e078de0e [2021-10-11 02:22:31,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/data/0cafaaefb/b0b214af5e1540b3bd927338f97156bc [2021-10-11 02:22:31,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:31,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:31,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:31,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:31,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:31,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:31" (1/1) ... [2021-10-11 02:22:31,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4252556d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:31, skipping insertion in model container [2021-10-11 02:22:31,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:31" (1/1) ... [2021-10-11 02:22:31,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:31,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:32,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:32,034 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:32,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:32,069 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:32,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32 WrapperNode [2021-10-11 02:22:32,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:32,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:32,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:32,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:32,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:32,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:32,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:32,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:32,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... [2021-10-11 02:22:32,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:32,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:32,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:32,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:32,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:22:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:32,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:22:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:22:32,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:32,687 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:22:32,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:32 BoogieIcfgContainer [2021-10-11 02:22:32,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:32,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:32,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:32,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:32,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:31" (1/3) ... [2021-10-11 02:22:32,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4eb03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:32, skipping insertion in model container [2021-10-11 02:22:32,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:32" (2/3) ... [2021-10-11 02:22:32,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4eb03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:32, skipping insertion in model container [2021-10-11 02:22:32,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:32" (3/3) ... [2021-10-11 02:22:32,699 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2021-10-11 02:22:32,714 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:32,717 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2021-10-11 02:22:32,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-11 02:22:32,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:32,744 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:22:32,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:32,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:32,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:32,745 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:32,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:32,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-10-11 02:22:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:22:32,764 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:32,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:22:32,766 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash 88734, now seen corresponding path program 1 times [2021-10-11 02:22:32,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:32,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462788672] [2021-10-11 02:22:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:32,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462788672] [2021-10-11 02:22:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:32,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:22:32,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917042865] [2021-10-11 02:22:32,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:32,960 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2021-10-11 02:22:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:33,043 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-10-11 02:22:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:33,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:22:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:33,053 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:22:33,053 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:22:33,055 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 [2021-10-11 02:22:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:22:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:22:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:22:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-11 02:22:33,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2021-10-11 02:22:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:33,086 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-11 02:22:33,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-11 02:22:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:22:33,103 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:33,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:22:33,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:33,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 88735, now seen corresponding path program 1 times [2021-10-11 02:22:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:33,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036425215] [2021-10-11 02:22:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:33,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036425215] [2021-10-11 02:22:33,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:33,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:22:33,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051666742] [2021-10-11 02:22:33,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:33,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:33,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:33,170 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2021-10-11 02:22:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:33,203 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 02:22:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:33,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:22:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:33,204 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:22:33,205 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:22:33,205 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 [2021-10-11 02:22:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:22:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:22:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:22:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:22:33,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 3 [2021-10-11 02:22:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:33,210 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:22:33,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:22:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:22:33,211 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:33,211 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:22:33,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:22:33,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash 85326552, now seen corresponding path program 1 times [2021-10-11 02:22:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140423946] [2021-10-11 02:22:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140423946] [2021-10-11 02:22:33,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208162891] [2021-10-11 02:22:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:22:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:33,444 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:22:33,445 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:22:33,454 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:22:33,455 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:22:33,456 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:22:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:33,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702632015] [2021-10-11 02:22:33,543 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:22:33,543 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:33,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:33,554 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:33,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:34,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:34,232 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-10-11 02:22:34,375 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:34,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:34,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:22:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463154540] [2021-10-11 02:22:34,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:34,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:34,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:22:34,378 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2021-10-11 02:22:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:34,520 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-10-11 02:22:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:22:34,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:22:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:34,524 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:22:34,524 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:22:34,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:22:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:22:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2021-10-11 02:22:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:22:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-11 02:22:34,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 5 [2021-10-11 02:22:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:34,536 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-11 02:22:34,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-11 02:22:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:22:34,537 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:34,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:22:34,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:22:34,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1149568740, now seen corresponding path program 1 times [2021-10-11 02:22:34,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:34,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671911221] [2021-10-11 02:22:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:22:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671911221] [2021-10-11 02:22:34,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:34,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:22:34,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133461243] [2021-10-11 02:22:34,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:34,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:34,820 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2021-10-11 02:22:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:34,861 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-10-11 02:22:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:34,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-10-11 02:22:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:34,863 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:22:34,864 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 02:22:34,864 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 [2021-10-11 02:22:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 02:22:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-11 02:22:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 02:22:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-10-11 02:22:34,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 9 [2021-10-11 02:22:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:34,869 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-10-11 02:22:34,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-10-11 02:22:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:22:34,870 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:34,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:34,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-11 02:22:34,870 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash 929151335, now seen corresponding path program 1 times [2021-10-11 02:22:34,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:34,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400802302] [2021-10-11 02:22:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:22:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400802302] [2021-10-11 02:22:34,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:34,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:34,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566658776] [2021-10-11 02:22:34,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:22:34,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:34,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:22:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:22:34,901 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2021-10-11 02:22:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:34,947 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:22:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:22:34,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:22:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:34,951 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:22:34,952 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:22:34,952 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 [2021-10-11 02:22:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:22:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-11 02:22:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 02:22:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-10-11 02:22:34,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2021-10-11 02:22:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:34,967 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-10-11 02:22:34,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:22:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-10-11 02:22:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:22:34,970 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:34,970 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:22:34,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-11 02:22:34,970 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:34,971 INFO L82 PathProgramCache]: Analyzing trace with hash -691331581, now seen corresponding path program 2 times [2021-10-11 02:22:34,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:34,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530231684] [2021-10-11 02:22:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530231684] [2021-10-11 02:22:35,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:35,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:22:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129471089] [2021-10-11 02:22:35,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:22:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:22:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:22:35,091 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 8 states. [2021-10-11 02:22:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:35,161 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-10-11 02:22:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:22:35,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-10-11 02:22:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:35,163 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:22:35,163 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:22:35,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:22:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:22:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-11 02:22:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:22:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-11 02:22:35,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-10-11 02:22:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:35,171 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-11 02:22:35,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:22:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-11 02:22:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:22:35,172 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:35,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:35,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-11 02:22:35,173 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1265835680, now seen corresponding path program 1 times [2021-10-11 02:22:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:35,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988583553] [2021-10-11 02:22:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988583553] [2021-10-11 02:22:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787902290] [2021-10-11 02:22:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:35,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:22:35,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:35,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343904326] [2021-10-11 02:22:35,427 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:22:35,427 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:35,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:35,428 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:35,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:35,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:36,248 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:36,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:36,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:22:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374833573] [2021-10-11 02:22:36,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:22:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:22:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:22:36,258 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2021-10-11 02:22:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:36,289 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-10-11 02:22:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:22:36,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-10-11 02:22:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:36,291 INFO L225 Difference]: With dead ends: 34 [2021-10-11 02:22:36,291 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:22:36,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:22:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:22:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-11 02:22:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:22:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-11 02:22:36,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-10-11 02:22:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:36,295 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-11 02:22:36,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:22:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-11 02:22:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:22:36,296 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:36,296 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:36,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:36,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -843141508, now seen corresponding path program 2 times [2021-10-11 02:22:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:36,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163317006] [2021-10-11 02:22:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163317006] [2021-10-11 02:22:36,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589320002] [2021-10-11 02:22:36,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:36,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:22:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:22:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:22:36,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:22:36,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:22:36,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2021-10-11 02:22:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502721950] [2021-10-11 02:22:36,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:22:36,798 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2021-10-11 02:22:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:36,838 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-10-11 02:22:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:22:36,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-10-11 02:22:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:36,840 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:22:36,840 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:22:36,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:22:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:22:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 02:22:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:22:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-11 02:22:36,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2021-10-11 02:22:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:36,847 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-11 02:22:36,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-11 02:22:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:22:36,848 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:36,848 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:37,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-11 02:22:37,075 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1491197133, now seen corresponding path program 1 times [2021-10-11 02:22:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:37,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741564266] [2021-10-11 02:22:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:22:37,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741564266] [2021-10-11 02:22:37,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963398140] [2021-10-11 02:22:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:22:37,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:22:37,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:22:37,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84988842] [2021-10-11 02:22:37,439 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:22:37,439 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:37,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:37,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:37,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:37,851 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:38,210 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-10-11 02:22:38,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:38,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:38,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-10-11 02:22:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163661760] [2021-10-11 02:22:38,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-10-11 02:22:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 02:22:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:22:38,364 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 16 states. [2021-10-11 02:22:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:38,466 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-11 02:22:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:22:38,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2021-10-11 02:22:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:38,472 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:22:38,472 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:22:38,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:22:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:22:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-11 02:22:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-11 02:22:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-10-11 02:22:38,481 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-10-11 02:22:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:38,482 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-10-11 02:22:38,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-10-11 02:22:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-10-11 02:22:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-11 02:22:38,483 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:38,483 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:38,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-11 02:22:38,684 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:22:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1389769989, now seen corresponding path program 2 times [2021-10-11 02:22:38,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:38,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356231881] [2021-10-11 02:22:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:22:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356231881] [2021-10-11 02:22:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942367502] [2021-10-11 02:22:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:39,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:22:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:22:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-11 02:22:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-11 02:22:39,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:22:39,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 4] total 24 [2021-10-11 02:22:39,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680303317] [2021-10-11 02:22:39,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:39,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:22:39,411 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2021-10-11 02:22:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:39,494 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-11 02:22:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:22:39,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2021-10-11 02:22:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:39,495 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:22:39,495 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:22:39,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-11 02:22:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:22:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:22:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:22:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:22:39,496 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-11 02:22:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:39,496 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:22:39,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:39,496 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:22:39,497 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:22:39,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:39,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:39 BoogieIcfgContainer [2021-10-11 02:22:39,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:39,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:39,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:39,728 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:39,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:32" (3/4) ... [2021-10-11 02:22:39,732 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:22:39,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:22:39,742 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:22:39,742 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:22:39,782 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4e89096-38f3-4f12-bda0-7d7f3f325bbe/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:39,783 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:39,784 INFO L168 Benchmark]: Toolchain (without parser) took 8001.00 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 61.2 MB in the beginning and 71.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,784 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:39,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.57 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 74.2 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.30 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,785 INFO L168 Benchmark]: Boogie Preprocessor took 24.12 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:39,785 INFO L168 Benchmark]: RCFGBuilder took 559.63 ms. Allocated memory is still 96.5 MB. Free memory was 71.6 MB in the beginning and 53.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,786 INFO L168 Benchmark]: TraceAbstraction took 7035.22 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 52.4 MB in the beginning and 73.1 MB in the end (delta: -20.7 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,786 INFO L168 Benchmark]: Witness Printer took 54.67 ms. Allocated memory is still 144.7 MB. Free memory was 73.1 MB in the beginning and 71.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:39,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.57 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 74.2 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.30 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.12 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 559.63 ms. Allocated memory is still 96.5 MB. Free memory was 71.6 MB in the beginning and 53.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7035.22 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 52.4 MB in the beginning and 73.1 MB in the end (delta: -20.7 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. * Witness Printer took 54.67 ms. Allocated memory is still 144.7 MB. Free memory was 73.1 MB in the beginning and 71.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 14, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 209 SDslu, 158 SDs, 0 SdLazy, 264 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 231 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 308 ConstructedInterpolants, 1 QuantifiedInterpolants, 73846 SizeOfPredicates, 1 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 507/868 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...