./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d8f817036215afe0570c141fddfde907924f85b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:27:44,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:27:44,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:27:44,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:27:44,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:27:44,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:27:44,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:27:44,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:27:44,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:27:44,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:27:44,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:27:44,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:27:44,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:27:44,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:27:44,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:27:44,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:27:44,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:27:44,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:27:44,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:27:44,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:27:44,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:27:44,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:27:44,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:27:44,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:27:44,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:27:44,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:27:44,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:27:44,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:27:44,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:27:44,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:27:44,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:27:44,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:27:44,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:27:44,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:27:44,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:27:44,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:27:44,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:27:44,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:27:44,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:27:44,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:27:44,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:27:44,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 20:27:44,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:27:44,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:27:44,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:27:44,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:27:44,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:27:44,463 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:27:44,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:27:44,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:27:44,463 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:27:44,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:27:44,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:27:44,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:27:44,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:27:44,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:27:44,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:27:44,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:27:44,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:27:44,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:27:44,466 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_427cde45-150b-4e3d-bdc7-20d4158eb296/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8f817036215afe0570c141fddfde907924f85b [2020-12-09 20:27:44,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:27:44,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:27:44,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:27:44,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:27:44,656 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:27:44,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/../../sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-09 20:27:44,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/data/2119b7fb1/c1bac6c719de4142a6f6036ff5b286cb/FLAG4da1e641e [2020-12-09 20:27:45,094 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:27:45,095 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-09 20:27:45,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/data/2119b7fb1/c1bac6c719de4142a6f6036ff5b286cb/FLAG4da1e641e [2020-12-09 20:27:45,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/data/2119b7fb1/c1bac6c719de4142a6f6036ff5b286cb [2020-12-09 20:27:45,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:27:45,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:27:45,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:27:45,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:27:45,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:27:45,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c26488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45, skipping insertion in model container [2020-12-09 20:27:45,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:27:45,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:27:45,368 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2020-12-09 20:27:45,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:27:45,380 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:27:45,415 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2020-12-09 20:27:45,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:27:45,461 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:27:45,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45 WrapperNode [2020-12-09 20:27:45,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:27:45,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:27:45,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:27:45,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:27:45,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:27:45,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:27:45,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:27:45,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:27:45,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... [2020-12-09 20:27:45,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:27:45,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:27:45,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:27:45,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:27:45,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/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 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:27:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 20:27:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:27:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:27:45,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:27:45,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:27:45,867 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 20:27:45,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:27:45 BoogieIcfgContainer [2020-12-09 20:27:45,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:27:45,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:27:45,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:27:45,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:27:45,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:27:45" (1/3) ... [2020-12-09 20:27:45,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c988664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:27:45, skipping insertion in model container [2020-12-09 20:27:45,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:27:45" (2/3) ... [2020-12-09 20:27:45,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c988664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:27:45, skipping insertion in model container [2020-12-09 20:27:45,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:27:45" (3/3) ... [2020-12-09 20:27:45,877 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-12-09 20:27:45,887 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:27:45,889 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-12-09 20:27:45,897 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-12-09 20:27:45,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:27:45,911 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:27:45,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:27:45,911 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:27:45,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:27:45,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:27:45,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:27:45,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:27:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-12-09 20:27:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:27:45,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:45,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:27:45,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash 4495207, now seen corresponding path program 1 times [2020-12-09 20:27:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:45,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333414481] [2020-12-09 20:27:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,046 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 20:27:46,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333414481] [2020-12-09 20:27:46,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:27:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928718646] [2020-12-09 20:27:46,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 20:27:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 20:27:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:27:46,064 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2020-12-09 20:27:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,076 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-12-09 20:27:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:27:46,077 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 20:27:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,083 INFO L225 Difference]: With dead ends: 48 [2020-12-09 20:27:46,083 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 20:27:46,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:27:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 20:27:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 20:27:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 20:27:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-09 20:27:46,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 4 [2020-12-09 20:27:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,115 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-09 20:27:46,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 20:27:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-09 20:27:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:27:46,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:27:46,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:27:46,116 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 139317741, now seen corresponding path program 1 times [2020-12-09 20:27:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293946036] [2020-12-09 20:27:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,174 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 20:27:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293946036] [2020-12-09 20:27:46,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:27:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940825335] [2020-12-09 20:27:46,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:27:46,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:27:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:27:46,178 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 4 states. [2020-12-09 20:27:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,273 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-09 20:27:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:27:46,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 20:27:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,276 INFO L225 Difference]: With dead ends: 53 [2020-12-09 20:27:46,276 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 20:27:46,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:27:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 20:27:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-09 20:27:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 20:27:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-12-09 20:27:46,284 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 5 [2020-12-09 20:27:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,284 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-12-09 20:27:46,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:27:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-12-09 20:27:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:27:46,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:27:46,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:27:46,285 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash 139317742, now seen corresponding path program 1 times [2020-12-09 20:27:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070925751] [2020-12-09 20:27:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,332 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 20:27:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070925751] [2020-12-09 20:27:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:27:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080794504] [2020-12-09 20:27:46,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:27:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:27:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:27:46,333 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-12-09 20:27:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,412 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-09 20:27:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:27:46,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 20:27:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,414 INFO L225 Difference]: With dead ends: 62 [2020-12-09 20:27:46,414 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 20:27:46,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:27:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 20:27:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-09 20:27:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 20:27:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-09 20:27:46,418 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 5 [2020-12-09 20:27:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,418 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-09 20:27:46,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:27:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-09 20:27:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:27:46,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:27:46,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:27:46,419 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash -941939298, now seen corresponding path program 1 times [2020-12-09 20:27:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805989666] [2020-12-09 20:27:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:27:46,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805989666] [2020-12-09 20:27:46,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:27:46,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993514513] [2020-12-09 20:27:46,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:27:46,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:27:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:27:46,463 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2020-12-09 20:27:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,538 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-09 20:27:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:27:46,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 20:27:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,539 INFO L225 Difference]: With dead ends: 74 [2020-12-09 20:27:46,539 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 20:27:46,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:27:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 20:27:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-12-09 20:27:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 20:27:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-09 20:27:46,544 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 10 [2020-12-09 20:27:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,544 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-09 20:27:46,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:27:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-09 20:27:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:27:46,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:27:46,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:27:46,545 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash -921899452, now seen corresponding path program 1 times [2020-12-09 20:27:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057728908] [2020-12-09 20:27:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:27:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057728908] [2020-12-09 20:27:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:27:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155992908] [2020-12-09 20:27:46,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:27:46,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:27:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:27:46,584 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 5 states. [2020-12-09 20:27:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,656 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-12-09 20:27:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:27:46,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 20:27:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,657 INFO L225 Difference]: With dead ends: 73 [2020-12-09 20:27:46,658 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 20:27:46,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:27:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 20:27:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-12-09 20:27:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-09 20:27:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-09 20:27:46,663 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 10 [2020-12-09 20:27:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,664 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-09 20:27:46,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:27:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-09 20:27:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:27:46,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:27:46,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:27:46,665 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash 864575346, now seen corresponding path program 1 times [2020-12-09 20:27:46,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342578421] [2020-12-09 20:27:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:27:46,714 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 20:27:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342578421] [2020-12-09 20:27:46,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:27:46,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:27:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278195599] [2020-12-09 20:27:46,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:27:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:27:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:27:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:27:46,716 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 5 states. [2020-12-09 20:27:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:27:46,793 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-12-09 20:27:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:27:46,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 20:27:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:27:46,794 INFO L225 Difference]: With dead ends: 71 [2020-12-09 20:27:46,794 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 20:27:46,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:27:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 20:27:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-12-09 20:27:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 20:27:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-09 20:27:46,798 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 11 [2020-12-09 20:27:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:27:46,799 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-09 20:27:46,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:27:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-09 20:27:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:27:46,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:27:46,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:27:46,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:27:46,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 20:27:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:27:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash 864575506, now seen corresponding path program 1 times [2020-12-09 20:27:46,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:27:46,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304828284] [2020-12-09 20:27:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:27:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:27:46,817 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:27:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:27:46,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:27:46,853 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:27:46,853 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:27:46,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 20:27:46,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:27:46 BoogieIcfgContainer [2020-12-09 20:27:46,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:27:46,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:27:46,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:27:46,869 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:27:46,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:27:45" (3/4) ... [2020-12-09 20:27:46,871 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:27:46,904 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_427cde45-150b-4e3d-bdc7-20d4158eb296/bin/utaipan/witness.graphml [2020-12-09 20:27:46,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:27:46,906 INFO L168 Benchmark]: Toolchain (without parser) took 1785.69 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 45.7 MB in the beginning and 57.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,906 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory is still 63.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:27:46,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.30 ms. Allocated memory is still 88.1 MB. Free memory was 45.5 MB in the beginning and 48.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.29 ms. Allocated memory is still 88.1 MB. Free memory was 48.9 MB in the beginning and 47.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,907 INFO L168 Benchmark]: Boogie Preprocessor took 25.01 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 45.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:27:46,908 INFO L168 Benchmark]: RCFGBuilder took 344.02 ms. Allocated memory is still 88.1 MB. Free memory was 45.4 MB in the beginning and 40.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,908 INFO L168 Benchmark]: TraceAbstraction took 998.49 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 39.5 MB in the beginning and 58.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 800.6 kB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,908 INFO L168 Benchmark]: Witness Printer took 35.33 ms. Allocated memory is still 107.0 MB. Free memory was 58.8 MB in the beginning and 57.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:27:46,910 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 88.1 MB. Free memory is still 63.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.30 ms. Allocated memory is still 88.1 MB. Free memory was 45.5 MB in the beginning and 48.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.29 ms. Allocated memory is still 88.1 MB. Free memory was 48.9 MB in the beginning and 47.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.01 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 45.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 344.02 ms. Allocated memory is still 88.1 MB. Free memory was 45.4 MB in the beginning and 40.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 998.49 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 39.5 MB in the beginning and 58.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 800.6 kB. Max. memory is 16.1 GB. * Witness Printer took 35.33 ms. Allocated memory is still 107.0 MB. Free memory was 58.8 MB in the beginning and 57.7 MB in the end (delta: 1.2 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: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 48 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 281 SDslu, 214 SDs, 0 SdLazy, 320 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 2/2 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...