./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c --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_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 1b1751fe95f9cf655681429038c1cde9e9c074e8 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 15:34:33,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:34:33,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:34:33,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:34:33,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:34:33,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:34:33,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:34:33,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:34:33,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:34:33,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:34:33,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:34:33,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:34:33,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:34:33,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:34:33,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:34:33,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:34:33,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:34:33,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:34:33,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:34:33,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:34:33,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:34:33,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:34:33,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:34:33,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:34:33,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:34:33,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:34:33,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:34:33,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:34:33,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:34:33,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:34:33,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:34:33,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:34:33,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:34:33,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:34:33,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:34:33,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:34:33,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:34:33,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:34:33,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:34:33,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:34:33,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:34:33,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 15:34:33,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:34:33,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:34:33,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:34:33,741 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:34:33,741 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:34:33,742 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:34:33,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:34:33,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:34:33,743 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:34:33,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 15:34:33,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 15:34:33,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:34:33,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:34:33,744 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 15:34:33,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:34:33,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:34:33,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:34:33,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:34:33,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:34:33,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:34:33,746 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_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b1751fe95f9cf655681429038c1cde9e9c074e8 [2020-12-09 15:34:33,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:34:33,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:34:33,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:34:33,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:34:33,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:34:33,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2020-12-09 15:34:33,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/data/d094a8012/e5667cf0dca04ff0bf1fb6b06d0e4b84/FLAG9bea81830 [2020-12-09 15:34:34,330 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:34:34,330 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2020-12-09 15:34:34,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/data/d094a8012/e5667cf0dca04ff0bf1fb6b06d0e4b84/FLAG9bea81830 [2020-12-09 15:34:34,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/data/d094a8012/e5667cf0dca04ff0bf1fb6b06d0e4b84 [2020-12-09 15:34:34,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:34:34,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:34:34,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:34:34,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:34:34,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:34:34,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd508c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34, skipping insertion in model container [2020-12-09 15:34:34,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:34:34,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:34:34,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:34:34,493 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:34:34,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:34:34,520 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:34:34,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34 WrapperNode [2020-12-09 15:34:34,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:34:34,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:34:34,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:34:34,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:34:34,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:34:34,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:34:34,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:34:34,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:34:34,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... [2020-12-09 15:34:34,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:34:34,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:34:34,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:34:34,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:34:34,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 15:34:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:34:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:34:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 15:34:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 15:34:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:34:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:34:34,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:34:34,823 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 15:34:34,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:34:34 BoogieIcfgContainer [2020-12-09 15:34:34,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:34:34,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:34:34,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:34:34,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:34:34,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:34:34" (1/3) ... [2020-12-09 15:34:34,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25132e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:34:34, skipping insertion in model container [2020-12-09 15:34:34,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:34:34" (2/3) ... [2020-12-09 15:34:34,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25132e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:34:34, skipping insertion in model container [2020-12-09 15:34:34,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:34:34" (3/3) ... [2020-12-09 15:34:34,830 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2020-12-09 15:34:34,840 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:34:34,843 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 15:34:34,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 15:34:34,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:34:34,866 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 15:34:34,866 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:34:34,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:34:34,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:34:34,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:34:34,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:34:34,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:34:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 15:34:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 15:34:34,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:34,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 15:34:34,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 72397, now seen corresponding path program 1 times [2020-12-09 15:34:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:34,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141865198] [2020-12-09 15:34:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:35,038 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 15:34:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141865198] [2020-12-09 15:34:35,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:34:35,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 15:34:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862062265] [2020-12-09 15:34:35,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:34:35,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:34:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:34:35,058 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-09 15:34:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:35,080 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-12-09 15:34:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:34:35,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 15:34:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:35,087 INFO L225 Difference]: With dead ends: 11 [2020-12-09 15:34:35,087 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 15:34:35,088 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 15:34:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 15:34:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 15:34:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 15:34:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 15:34:35,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2020-12-09 15:34:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:35,110 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 15:34:35,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:34:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 15:34:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 15:34:35,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:35,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 15:34:35,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:34:35,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:35,112 INFO L82 PathProgramCache]: Analyzing trace with hash 72398, now seen corresponding path program 1 times [2020-12-09 15:34:35,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:35,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588964021] [2020-12-09 15:34:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:35,149 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 15:34:35,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588964021] [2020-12-09 15:34:35,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:34:35,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 15:34:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328503319] [2020-12-09 15:34:35,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:34:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:34:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:34:35,152 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-09 15:34:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:35,165 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 15:34:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:34:35,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 15:34:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:35,166 INFO L225 Difference]: With dead ends: 12 [2020-12-09 15:34:35,166 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 15:34:35,167 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 15:34:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 15:34:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 15:34:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 15:34:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-09 15:34:35,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2020-12-09 15:34:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:35,169 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-09 15:34:35,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:34:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-09 15:34:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:34:35,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:35,169 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 15:34:35,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:34:35,170 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash 69605553, now seen corresponding path program 1 times [2020-12-09 15:34:35,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:35,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049192916] [2020-12-09 15:34:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:35,218 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 15:34:35,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049192916] [2020-12-09 15:34:35,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591737354] [2020-12-09 15:34:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 15:34:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:34:35,320 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 15:34:35,320 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 15:34:35,323 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 15:34:35,342 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-09 15:34:35,349 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 15:34:35,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-12-09 15:34:35,364 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 15:34:35,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:34:35,396 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 15:34:35,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484740129] [2020-12-09 15:34:35,413 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 15:34:35,413 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:34:35,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:34:35,421 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:34:35,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:34:35,814 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:34:35,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:34:35,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:34:35,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 15:34:35,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974430527] [2020-12-09 15:34:35,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:34:35,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:34:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 15:34:35,953 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-09 15:34:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:36,011 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-09 15:34:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:34:36,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 15:34:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:36,012 INFO L225 Difference]: With dead ends: 30 [2020-12-09 15:34:36,013 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 15:34:36,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 15:34:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 15:34:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2020-12-09 15:34:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 15:34:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 15:34:36,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2020-12-09 15:34:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:36,017 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 15:34:36,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:34:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 15:34:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 15:34:36,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:36,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 15:34:36,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 15:34:36,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash -849168678, now seen corresponding path program 1 times [2020-12-09 15:34:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:36,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381021693] [2020-12-09 15:34:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:34:36,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381021693] [2020-12-09 15:34:36,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:34:36,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:34:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505336933] [2020-12-09 15:34:36,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:34:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:34:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:34:36,332 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-09 15:34:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:36,357 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 15:34:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:34:36,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 15:34:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:36,359 INFO L225 Difference]: With dead ends: 22 [2020-12-09 15:34:36,359 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 15:34:36,359 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 15:34:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 15:34:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-09 15:34:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 15:34:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 15:34:36,363 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2020-12-09 15:34:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:36,363 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 15:34:36,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:34:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 15:34:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 15:34:36,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:36,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 15:34:36,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 15:34:36,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -849169369, now seen corresponding path program 1 times [2020-12-09 15:34:36,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280613321] [2020-12-09 15:34:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:36,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280613321] [2020-12-09 15:34:36,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819875092] [2020-12-09 15:34:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 15:34:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:34:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:36,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:34:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:36,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239083401] [2020-12-09 15:34:36,482 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 15:34:36,482 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:34:36,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:34:36,482 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:34:36,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:34:36,741 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:34:36,932 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:34:36,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:34:36,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 15:34:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407253688] [2020-12-09 15:34:36,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 15:34:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 15:34:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:34:36,935 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 9 states. [2020-12-09 15:34:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:36,969 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 15:34:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 15:34:36,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2020-12-09 15:34:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:36,970 INFO L225 Difference]: With dead ends: 23 [2020-12-09 15:34:36,970 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 15:34:36,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:34:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 15:34:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-09 15:34:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 15:34:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 15:34:36,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2020-12-09 15:34:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:36,973 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 15:34:36,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 15:34:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 15:34:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:34:36,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:36,973 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 15:34:37,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:34:37,175 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1464187430, now seen corresponding path program 2 times [2020-12-09 15:34:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:37,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616444790] [2020-12-09 15:34:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:37,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616444790] [2020-12-09 15:34:37,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650817078] [2020-12-09 15:34:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:37,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 15:34:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:34:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 15:34:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:34:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 15:34:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:34:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 15:34:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 15:34:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-12-09 15:34:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901012745] [2020-12-09 15:34:37,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:34:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:37,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:34:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 15:34:37,554 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-09 15:34:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:37,570 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 15:34:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:34:37,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 15:34:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:37,571 INFO L225 Difference]: With dead ends: 21 [2020-12-09 15:34:37,571 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 15:34:37,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 15:34:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 15:34:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 15:34:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 15:34:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 15:34:37,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-12-09 15:34:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:37,574 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 15:34:37,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:34:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 15:34:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 15:34:37,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:37,574 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-12-09 15:34:37,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-09 15:34:37,776 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash 623284379, now seen corresponding path program 2 times [2020-12-09 15:34:37,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610542001] [2020-12-09 15:34:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:37,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610542001] [2020-12-09 15:34:37,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614546668] [2020-12-09 15:34:37,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:37,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 15:34:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:34:37,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 15:34:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:34:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 15:34:38,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:34:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 15:34:38,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:34:38,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 15:34:38,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223454089] [2020-12-09 15:34:38,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:34:38,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:34:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:34:38,082 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-12-09 15:34:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:38,127 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-09 15:34:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:34:38,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 15:34:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:38,128 INFO L225 Difference]: With dead ends: 28 [2020-12-09 15:34:38,128 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 15:34:38,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 15:34:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 15:34:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-09 15:34:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 15:34:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 15:34:38,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-09 15:34:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:38,130 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 15:34:38,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:34:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 15:34:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 15:34:38,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:38,131 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-12-09 15:34:38,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:34:38,332 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:38,334 INFO L82 PathProgramCache]: Analyzing trace with hash 623284378, now seen corresponding path program 1 times [2020-12-09 15:34:38,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583770115] [2020-12-09 15:34:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:38,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583770115] [2020-12-09 15:34:38,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532406727] [2020-12-09 15:34:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/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 15:34:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:34:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:34:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:34:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:38,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:34:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:34:38,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056354622] [2020-12-09 15:34:38,640 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 15:34:38,641 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:34:38,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:34:38,641 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:34:38,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:34:38,845 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:34:38,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:34:38,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:34:38,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 15:34:39,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910775705] [2020-12-09 15:34:39,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 15:34:39,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:34:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 15:34:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-09 15:34:39,001 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2020-12-09 15:34:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:34:39,030 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 15:34:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 15:34:39,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-09 15:34:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:34:39,034 INFO L225 Difference]: With dead ends: 32 [2020-12-09 15:34:39,034 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 15:34:39,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-09 15:34:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 15:34:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 15:34:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 15:34:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-09 15:34:39,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-09 15:34:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:34:39,037 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-09 15:34:39,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 15:34:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-09 15:34:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 15:34:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:34:39,038 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2020-12-09 15:34:39,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-09 15:34:39,239 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:34:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:34:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash 139507982, now seen corresponding path program 2 times [2020-12-09 15:34:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:34:39,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088057035] [2020-12-09 15:34:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:34:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:34:39,315 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:34:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:34:39,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:34:39,396 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 15:34:39,397 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 15:34:39,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-12-09 15:34:39,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:34:39 BoogieIcfgContainer [2020-12-09 15:34:39,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:34:39,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:34:39,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:34:39,420 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:34:39,420 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:34:34" (3/4) ... [2020-12-09 15:34:39,421 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 15:34:39,450 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cb103b89-1cc3-4351-8e6f-cf249afda5ec/bin/utaipan/witness.graphml [2020-12-09 15:34:39,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:34:39,451 INFO L168 Benchmark]: Toolchain (without parser) took 5103.22 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 85.0 MB in the beginning and 113.2 MB in the end (delta: -28.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:34:39,451 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 123.7 MB. Free memory is still 101.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:34:39,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.22 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 98.4 MB in the end (delta: -13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 15:34:39,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.05 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 97.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:34:39,452 INFO L168 Benchmark]: Boogie Preprocessor took 15.30 ms. Allocated memory is still 123.7 MB. Free memory was 97.4 MB in the beginning and 95.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:34:39,452 INFO L168 Benchmark]: RCFGBuilder took 260.97 ms. Allocated memory is still 123.7 MB. Free memory was 95.8 MB in the beginning and 77.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 15:34:39,452 INFO L168 Benchmark]: TraceAbstraction took 4593.79 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 76.9 MB in the beginning and 115.3 MB in the end (delta: -38.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:34:39,453 INFO L168 Benchmark]: Witness Printer took 30.42 ms. Allocated memory is still 148.9 MB. Free memory was 115.3 MB in the beginning and 113.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:34:39,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 123.7 MB. Free memory is still 101.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.22 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 98.4 MB in the end (delta: -13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.05 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 97.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.30 ms. Allocated memory is still 123.7 MB. Free memory was 97.4 MB in the beginning and 95.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 260.97 ms. Allocated memory is still 123.7 MB. Free memory was 95.8 MB in the beginning and 77.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4593.79 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 76.9 MB in the beginning and 115.3 MB in the end (delta: -38.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 30.42 ms. Allocated memory is still 148.9 MB. Free memory was 115.3 MB in the beginning and 113.2 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: - CounterExampleResult [Line: 22]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] int *array = alloca(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND FALSE !(i < 10) [L14] return array; [L19] int *numbers = getNumbers(); [L21] int i = 0; [L21] COND TRUE i < 10 [L22] numbers + i - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 78 SDslu, 65 SDs, 0 SdLazy, 132 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=8, 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, 8 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 150 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 12936 SizeOfPredicates, 14 NumberOfNonLiveVariables, 306 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 120/298 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...