./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/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 af4b28e958de4f654443dbaa4f0a24d91f735460 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-a4ecdab [2020-11-28 07:38:26,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:26,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:26,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:26,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:26,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:26,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:26,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:26,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:26,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:26,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:26,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:26,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:26,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:26,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:26,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:26,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:26,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:26,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:26,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:26,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:26,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:26,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:26,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:26,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:26,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:26,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:26,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:26,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:26,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:26,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:26,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:26,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:26,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:26,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:26,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:26,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:26,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:26,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:26,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:26,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:26,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-11-28 07:38:26,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:26,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:26,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:26,460 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:26,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:26,460 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:26,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:26,461 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:26,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:26,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:26,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:26,462 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:26,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:26,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:26,463 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:26,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:38:26,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:38:26,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:26,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:26,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:38:26,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:26,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:26,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:26,466 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:38:26,466 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:38:26,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:26,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:26,469 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:26,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:26,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:26,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:26,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:26,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:26,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:26,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:26,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:26,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:26,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:26,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:26,472 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_2f8f1575-c47a-41b4-b5e6-38bbc103b048/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4b28e958de4f654443dbaa4f0a24d91f735460 [2020-11-28 07:38:26,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:26,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:26,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:26,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:26,894 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:26,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-1.i [2020-11-28 07:38:26,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/data/6e8c362f5/2d6ce4ce5795402fb99c2ba58afc49f3/FLAGd4b7a63de [2020-11-28 07:38:27,606 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:27,606 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/sv-benchmarks/c/list-properties/simple-1.i [2020-11-28 07:38:27,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/data/6e8c362f5/2d6ce4ce5795402fb99c2ba58afc49f3/FLAGd4b7a63de [2020-11-28 07:38:27,866 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/data/6e8c362f5/2d6ce4ce5795402fb99c2ba58afc49f3 [2020-11-28 07:38:27,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:27,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:27,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:27,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:27,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:27,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd9307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27, skipping insertion in model container [2020-11-28 07:38:27,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:27,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:28,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:28,341 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:28,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:28,428 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:28,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28 WrapperNode [2020-11-28 07:38:28,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:28,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:28,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:28,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:28,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:28,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:28,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:28,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:28,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... [2020-11-28 07:38:28,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:28,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:28,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:28,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:28,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:38:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:38:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:38:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:38:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:38:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:28,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:29,288 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:29,288 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:38:29,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:29 BoogieIcfgContainer [2020-11-28 07:38:29,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:29,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:29,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:29,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:29,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:27" (1/3) ... [2020-11-28 07:38:29,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ea7561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:29, skipping insertion in model container [2020-11-28 07:38:29,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:28" (2/3) ... [2020-11-28 07:38:29,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ea7561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:29, skipping insertion in model container [2020-11-28 07:38:29,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:29" (3/3) ... [2020-11-28 07:38:29,301 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-11-28 07:38:29,312 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:29,316 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-11-28 07:38:29,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-11-28 07:38:29,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:29,374 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:38:29,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:29,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:29,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:29,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:29,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:29,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-28 07:38:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:38:29,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:29,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:38:29,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 124074, now seen corresponding path program 1 times [2020-11-28 07:38:29,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:29,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655344102] [2020-11-28 07:38:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:29,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655344102] [2020-11-28 07:38:29,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:29,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:38:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508641625] [2020-11-28 07:38:29,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:38:29,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:38:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:38:29,593 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-28 07:38:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:29,670 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-28 07:38:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:38:29,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:38:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:29,680 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:38:29,680 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:38:29,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:38:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:38:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-28 07:38:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 07:38:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-28 07:38:29,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 3 [2020-11-28 07:38:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:29,714 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-28 07:38:29,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:38:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-28 07:38:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:38:29,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:29,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:38:29,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:29,715 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash 124075, now seen corresponding path program 1 times [2020-11-28 07:38:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:29,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178995911] [2020-11-28 07:38:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:29,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178995911] [2020-11-28 07:38:29,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:29,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:38:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761970333] [2020-11-28 07:38:29,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:38:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:38:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:38:29,790 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 3 states. [2020-11-28 07:38:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:29,856 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-28 07:38:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:38:29,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:38:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:29,858 INFO L225 Difference]: With dead ends: 34 [2020-11-28 07:38:29,858 INFO L226 Difference]: Without dead ends: 34 [2020-11-28 07:38:29,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:38:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-28 07:38:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-28 07:38:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 07:38:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-28 07:38:29,864 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 3 [2020-11-28 07:38:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:29,864 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-28 07:38:29,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:38:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-28 07:38:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:29,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:29,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:29,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:29,866 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -598690558, now seen corresponding path program 1 times [2020-11-28 07:38:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:29,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128443808] [2020-11-28 07:38:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128443808] [2020-11-28 07:38:29,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:29,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:38:29,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861010065] [2020-11-28 07:38:29,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:29,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:29,925 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 4 states. [2020-11-28 07:38:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:30,094 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-28 07:38:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:38:30,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:38:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:30,096 INFO L225 Difference]: With dead ends: 60 [2020-11-28 07:38:30,096 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 07:38:30,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 07:38:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2020-11-28 07:38:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 07:38:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-11-28 07:38:30,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2020-11-28 07:38:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:30,102 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-11-28 07:38:30,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-11-28 07:38:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:30,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:30,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:30,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:38:30,103 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -598690557, now seen corresponding path program 1 times [2020-11-28 07:38:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:30,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583758061] [2020-11-28 07:38:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583758061] [2020-11-28 07:38:30,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:30,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498576398] [2020-11-28 07:38:30,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:30,212 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2020-11-28 07:38:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:30,313 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-28 07:38:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:30,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:38:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:30,314 INFO L225 Difference]: With dead ends: 50 [2020-11-28 07:38:30,314 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:38:30,315 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 [2020-11-28 07:38:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:38:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-11-28 07:38:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:38:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-11-28 07:38:30,320 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 6 [2020-11-28 07:38:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:30,320 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-11-28 07:38:30,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-11-28 07:38:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:38:30,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:30,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:38:30,322 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1408836533, now seen corresponding path program 1 times [2020-11-28 07:38:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608606937] [2020-11-28 07:38:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:30,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608606937] [2020-11-28 07:38:30,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:30,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:38:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971902958] [2020-11-28 07:38:30,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:30,397 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 4 states. [2020-11-28 07:38:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:30,468 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-28 07:38:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:30,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:38:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:30,469 INFO L225 Difference]: With dead ends: 48 [2020-11-28 07:38:30,469 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 07:38:30,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 07:38:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-11-28 07:38:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:38:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-28 07:38:30,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 9 [2020-11-28 07:38:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:30,475 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-28 07:38:30,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-28 07:38:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:38:30,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:30,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:30,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:38:30,476 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash 187339587, now seen corresponding path program 1 times [2020-11-28 07:38:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:30,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300391998] [2020-11-28 07:38:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300391998] [2020-11-28 07:38:30,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:30,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 07:38:30,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969611248] [2020-11-28 07:38:30,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:38:30,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:38:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:38:30,599 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-11-28 07:38:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:30,737 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-11-28 07:38:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:38:30,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 07:38:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:30,739 INFO L225 Difference]: With dead ends: 50 [2020-11-28 07:38:30,739 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:38:30,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:38:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:38:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-11-28 07:38:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 07:38:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-28 07:38:30,745 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 12 [2020-11-28 07:38:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:30,745 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-28 07:38:30,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:38:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-28 07:38:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:38:30,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:30,746 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:30,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:38:30,747 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 638290174, now seen corresponding path program 1 times [2020-11-28 07:38:30,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:30,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394592202] [2020-11-28 07:38:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:30,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394592202] [2020-11-28 07:38:30,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:30,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:30,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957613325] [2020-11-28 07:38:30,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:38:30,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:38:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:30,851 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-11-28 07:38:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:31,005 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-28 07:38:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:38:31,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-28 07:38:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:31,006 INFO L225 Difference]: With dead ends: 56 [2020-11-28 07:38:31,007 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 07:38:31,007 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 [2020-11-28 07:38:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 07:38:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-11-28 07:38:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 07:38:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-28 07:38:31,012 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 12 [2020-11-28 07:38:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:31,012 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-28 07:38:31,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:38:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-28 07:38:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:38:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:31,013 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:31,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:38:31,013 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 638290175, now seen corresponding path program 1 times [2020-11-28 07:38:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:31,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115187654] [2020-11-28 07:38:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:31,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115187654] [2020-11-28 07:38:31,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:31,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:31,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576854699] [2020-11-28 07:38:31,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:38:31,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:38:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:31,141 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-11-28 07:38:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:31,308 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-28 07:38:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:38:31,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-28 07:38:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:31,309 INFO L225 Difference]: With dead ends: 51 [2020-11-28 07:38:31,309 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 07:38:31,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:38:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 07:38:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-11-28 07:38:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 07:38:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-28 07:38:31,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 12 [2020-11-28 07:38:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:31,313 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-28 07:38:31,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:38:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-28 07:38:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:38:31,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:31,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:31,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:38:31,314 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1511900714, now seen corresponding path program 1 times [2020-11-28 07:38:31,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:31,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803424365] [2020-11-28 07:38:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:31,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:31,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:31,417 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:31,418 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:31,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:38:31,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:31 BoogieIcfgContainer [2020-11-28 07:38:31,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:31,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:31,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:31,455 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:31,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:29" (3/4) ... [2020-11-28 07:38:31,458 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:31,506 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f8f1575-c47a-41b4-b5e6-38bbc103b048/bin/utaipan/witness.graphml [2020-11-28 07:38:31,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:31,509 INFO L168 Benchmark]: Toolchain (without parser) took 3634.59 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 69.2 MB in the beginning and 74.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,509 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:31,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.38 ms. Allocated memory is still 111.1 MB. Free memory was 69.0 MB in the beginning and 77.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,511 INFO L168 Benchmark]: Boogie Preprocessor took 27.75 ms. Allocated memory is still 111.1 MB. Free memory was 75.6 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,512 INFO L168 Benchmark]: RCFGBuilder took 790.82 ms. Allocated memory is still 111.1 MB. Free memory was 74.4 MB in the beginning and 47.1 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,512 INFO L168 Benchmark]: TraceAbstraction took 2163.13 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 46.7 MB in the beginning and 76.6 MB in the end (delta: -29.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,513 INFO L168 Benchmark]: Witness Printer took 51.67 ms. Allocated memory is still 148.9 MB. Free memory was 76.6 MB in the beginning and 74.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:31,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 552.38 ms. Allocated memory is still 111.1 MB. Free memory was 69.0 MB in the beginning and 77.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.75 ms. Allocated memory is still 111.1 MB. Free memory was 75.6 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 790.82 ms. Allocated memory is still 111.1 MB. Free memory was 74.4 MB in the beginning and 47.1 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2163.13 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 46.7 MB in the beginning and 76.6 MB in the end (delta: -29.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 51.67 ms. Allocated memory is still 148.9 MB. Free memory was 76.6 MB in the beginning and 74.5 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: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] a->h = 2 [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n [L551] p = p->n [L547] COND FALSE !(p!=0) [L553] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 307 SDslu, 144 SDs, 0 SdLazy, 386 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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, 8 MinimizatonAttempts, 68 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 2522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 4/4 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...