./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cf39454d83b4ec00341bd0b620b0fa6b2321ce21 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:52:39,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:52:39,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:52:39,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:52:39,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:52:39,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:52:39,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:52:39,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:52:39,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:52:39,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:52:39,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:52:39,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:52:39,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:52:39,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:52:39,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:52:39,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:52:39,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:52:39,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:52:39,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:52:39,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:52:39,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:52:39,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:52:39,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:52:39,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:52:39,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:52:39,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:52:39,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:52:39,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:52:39,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:52:39,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:52:39,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:52:39,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:52:39,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:52:39,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:52:39,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:52:39,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:52:39,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:52:39,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:52:39,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:52:39,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:52:39,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:52:39,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-12-09 17:52:39,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:52:39,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:52:39,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:52:39,418 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:52:39,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:52:39,418 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:52:39,418 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:52:39,419 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:52:39,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:52:39,419 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:52:39,419 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:52:39,419 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:52:39,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:52:39,420 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:52:39,420 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:52:39,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:52:39,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:52:39,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:52:39,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:52:39,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:52:39,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:52:39,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:52:39,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:52:39,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:52:39,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:52:39,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:52:39,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:52:39,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:52:39,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:52:39,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:52:39,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:52:39,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:52:39,423 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:52:39,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:52:39,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:52:39,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:52:39,424 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_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf39454d83b4ec00341bd0b620b0fa6b2321ce21 [2020-12-09 17:52:39,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:52:39,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:52:39,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:52:39,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:52:39,625 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:52:39,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2020-12-09 17:52:39,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/data/66bcad320/e00abffe794b40e1b1f925a8ee6defac/FLAGf98171c10 [2020-12-09 17:52:39,976 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:52:39,977 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2020-12-09 17:52:39,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/data/66bcad320/e00abffe794b40e1b1f925a8ee6defac/FLAGf98171c10 [2020-12-09 17:52:40,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/data/66bcad320/e00abffe794b40e1b1f925a8ee6defac [2020-12-09 17:52:40,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:52:40,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:52:40,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:52:40,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:52:40,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:52:40,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404d9487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40, skipping insertion in model container [2020-12-09 17:52:40,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:52:40,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:52:40,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:52:40,522 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:52:40,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:52:40,545 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:52:40,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40 WrapperNode [2020-12-09 17:52:40,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:52:40,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:52:40,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:52:40,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:52:40,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:52:40,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:52:40,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:52:40,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:52:40,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... [2020-12-09 17:52:40,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:52:40,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:52:40,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:52:40,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:52:40,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/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 17:52:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:52:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:52:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:52:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:52:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:52:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:52:40,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:52:40,837 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 17:52:40,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:40 BoogieIcfgContainer [2020-12-09 17:52:40,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:52:40,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:52:40,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:52:40,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:52:40,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:52:40" (1/3) ... [2020-12-09 17:52:40,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a1580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:40, skipping insertion in model container [2020-12-09 17:52:40,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:40" (2/3) ... [2020-12-09 17:52:40,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a1580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:40, skipping insertion in model container [2020-12-09 17:52:40,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:40" (3/3) ... [2020-12-09 17:52:40,849 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2020-12-09 17:52:40,863 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:52:40,865 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-09 17:52:40,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-09 17:52:40,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:52:40,888 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:52:40,888 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:52:40,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:52:40,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:52:40,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:52:40,889 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:52:40,889 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:52:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 17:52:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:52:40,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:40,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:52:40,902 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash 75602, now seen corresponding path program 1 times [2020-12-09 17:52:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:40,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455115485] [2020-12-09 17:52:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:41,009 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 17:52:41,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455115485] [2020-12-09 17:52:41,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:41,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:52:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412330480] [2020-12-09 17:52:41,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:41,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,031 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 17:52:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:41,052 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 17:52:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:41,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:52:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:41,061 INFO L225 Difference]: With dead ends: 23 [2020-12-09 17:52:41,061 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 17:52:41,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 17:52:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-09 17:52:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 17:52:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-09 17:52:41,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2020-12-09 17:52:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:41,093 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-09 17:52:41,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-09 17:52:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:52:41,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:41,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:52:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:52:41,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 74319, now seen corresponding path program 1 times [2020-12-09 17:52:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430704852] [2020-12-09 17:52:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:41,124 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 17:52:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430704852] [2020-12-09 17:52:41,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:41,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:52:41,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573416174] [2020-12-09 17:52:41,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:41,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:41,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,128 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2020-12-09 17:52:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:41,148 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-12-09 17:52:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:41,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:52:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:41,149 INFO L225 Difference]: With dead ends: 15 [2020-12-09 17:52:41,149 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 17:52:41,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 17:52:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 17:52:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 17:52:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 17:52:41,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2020-12-09 17:52:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:41,153 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 17:52:41,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 17:52:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:52:41,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:41,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:52:41,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:52:41,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 74320, now seen corresponding path program 1 times [2020-12-09 17:52:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:41,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012108301] [2020-12-09 17:52:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:41,197 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 17:52:41,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012108301] [2020-12-09 17:52:41,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:41,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:52:41,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470525115] [2020-12-09 17:52:41,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:41,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,199 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2020-12-09 17:52:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:41,220 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-09 17:52:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:41,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:52:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:41,221 INFO L225 Difference]: With dead ends: 16 [2020-12-09 17:52:41,221 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 17:52:41,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 17:52:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 17:52:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 17:52:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 17:52:41,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2020-12-09 17:52:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:41,225 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 17:52:41,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 17:52:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:52:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:41,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:52:41,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:52:41,226 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash 71457722, now seen corresponding path program 1 times [2020-12-09 17:52:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:41,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318507997] [2020-12-09 17:52:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:41,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318507997] [2020-12-09 17:52:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863998172] [2020-12-09 17:52:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 17:52:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:41,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:41,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476161012] [2020-12-09 17:52:41,367 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 17:52:41,367 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:41,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:41,374 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:41,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:41,749 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:52:41,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:41,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2020-12-09 17:52:41,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222647009] [2020-12-09 17:52:41,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:52:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:52:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:52:41,966 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-12-09 17:52:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:42,086 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-12-09 17:52:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:52:42,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 17:52:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:42,087 INFO L225 Difference]: With dead ends: 13 [2020-12-09 17:52:42,087 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 17:52:42,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:52:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 17:52:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 17:52:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 17:52:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-09 17:52:42,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2020-12-09 17:52:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:42,089 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-09 17:52:42,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:52:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-09 17:52:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:52:42,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:42,089 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 17:52:42,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-12-09 17:52:42,291 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 71456439, now seen corresponding path program 1 times [2020-12-09 17:52:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:42,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303691832] [2020-12-09 17:52:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:42,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303691832] [2020-12-09 17:52:42,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127537211] [2020-12-09 17:52:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:42,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:52:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:42,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162993444] [2020-12-09 17:52:42,515 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 17:52:42,515 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:42,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:42,516 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:42,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:42,730 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:52:42,915 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-12-09 17:52:42,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:52:42,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:42,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 17:52:42,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537860830] [2020-12-09 17:52:42,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:52:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:52:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:52:42,964 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2020-12-09 17:52:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:43,025 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-12-09 17:52:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:52:43,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 17:52:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:43,026 INFO L225 Difference]: With dead ends: 29 [2020-12-09 17:52:43,026 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 17:52:43,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:52:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 17:52:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-09 17:52:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 17:52:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 17:52:43,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2020-12-09 17:52:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:43,029 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 17:52:43,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:52:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 17:52:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:52:43,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:43,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:43,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-09 17:52:43,231 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1907209345, now seen corresponding path program 1 times [2020-12-09 17:52:43,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:43,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618079658] [2020-12-09 17:52:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:43,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618079658] [2020-12-09 17:52:43,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705247380] [2020-12-09 17:52:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:52:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:43,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808524039] [2020-12-09 17:52:43,472 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 17:52:43,472 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:43,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:43,472 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:43,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:43,657 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:52:43,801 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-12-09 17:52:44,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:52:44,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:44,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 17:52:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326912550] [2020-12-09 17:52:44,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:52:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:52:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-09 17:52:44,077 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 8 states. [2020-12-09 17:52:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:44,097 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 17:52:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 17:52:44,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 17:52:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:44,098 INFO L225 Difference]: With dead ends: 23 [2020-12-09 17:52:44,098 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 17:52:44,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-09 17:52:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 17:52:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-09 17:52:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 17:52:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 17:52:44,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2020-12-09 17:52:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:44,101 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 17:52:44,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:52:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 17:52:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:52:44,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:44,101 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 17:52:44,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-09 17:52:44,303 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -144260756, now seen corresponding path program 2 times [2020-12-09 17:52:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:44,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919602501] [2020-12-09 17:52:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919602501] [2020-12-09 17:52:44,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:44,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:52:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845024213] [2020-12-09 17:52:44,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:52:44,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:44,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:52:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:52:44,431 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-09 17:52:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:44,459 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 17:52:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 17:52:44,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 17:52:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:44,459 INFO L225 Difference]: With dead ends: 21 [2020-12-09 17:52:44,459 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 17:52:44,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:52:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 17:52:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 17:52:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 17:52:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 17:52:44,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-12-09 17:52:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:44,462 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 17:52:44,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:52:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 17:52:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:52:44,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:44,462 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:44,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-12-09 17:52:44,462 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1563642653, now seen corresponding path program 2 times [2020-12-09 17:52:44,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:44,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543730298] [2020-12-09 17:52:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:44,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543730298] [2020-12-09 17:52:44,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135044629] [2020-12-09 17:52:44,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 17:52:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:52:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:52:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:52:44,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:52:44,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:52:44,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 17:52:44,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021594696] [2020-12-09 17:52:44,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:52:44,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:52:44,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:52:44,613 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-12-09 17:52:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:44,632 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 17:52:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:52:44,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 17:52:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:44,632 INFO L225 Difference]: With dead ends: 20 [2020-12-09 17:52:44,632 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:52:44,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:52:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:52:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:52:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:52:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:52:44,633 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 17:52:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:44,633 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:52:44,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:52:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:52:44,634 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:52:44,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:44,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:52:44 BoogieIcfgContainer [2020-12-09 17:52:44,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:52:44,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:52:44,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:52:44,849 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:52:44,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:40" (3/4) ... [2020-12-09 17:52:44,857 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:52:44,892 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 17:52:44,893 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 17:52:44,893 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 17:52:44,945 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_59d9083a-6a00-456b-8d9e-8e1fd0bcc8c2/bin/utaipan/witness.graphml [2020-12-09 17:52:44,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:52:44,946 INFO L168 Benchmark]: Toolchain (without parser) took 4543.12 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 72.1 MB in the beginning and 100.3 MB in the end (delta: -28.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:44,946 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:44,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.53 ms. Allocated memory is still 102.8 MB. Free memory was 72.0 MB in the beginning and 63.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:44,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.60 ms. Allocated memory is still 102.8 MB. Free memory was 63.1 MB in the beginning and 61.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:44,947 INFO L168 Benchmark]: Boogie Preprocessor took 14.92 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 60.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:44,947 INFO L168 Benchmark]: RCFGBuilder took 255.44 ms. Allocated memory is still 102.8 MB. Free memory was 60.6 MB in the beginning and 75.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:44,947 INFO L168 Benchmark]: TraceAbstraction took 4006.30 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 74.7 MB in the beginning and 98.2 MB in the end (delta: -23.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:44,948 INFO L168 Benchmark]: Witness Printer took 96.31 ms. Allocated memory is still 123.7 MB. Free memory was 98.2 MB in the beginning and 100.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:44,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 142.53 ms. Allocated memory is still 102.8 MB. Free memory was 72.0 MB in the beginning and 63.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.60 ms. Allocated memory is still 102.8 MB. Free memory was 63.1 MB in the beginning and 61.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.92 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 60.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 255.44 ms. Allocated memory is still 102.8 MB. Free memory was 60.6 MB in the beginning and 75.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4006.30 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 74.7 MB in the beginning and 98.2 MB in the end (delta: -23.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 96.31 ms. Allocated memory is still 123.7 MB. Free memory was 98.2 MB in the beginning and 100.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 93 SDslu, 59 SDs, 0 SdLazy, 168 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 96 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 118 ConstructedInterpolants, 1 QuantifiedInterpolants, 10088 SizeOfPredicates, 0 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 92/149 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 383, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME[ms]: 230, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 11, TOOLS_QUANTIFIERELIM_TIME[ms]: 224, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 90, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 24, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 28, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 86, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 5, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 249, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 248, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 40, DAG_COMPRESSION_RETAINED_NODES: 18, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...