./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f7670ede459996daea4f0d5b6d4f8f7722cb2c07f35d54c8d0ca4957e40998d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:55:00,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:55:00,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:55:00,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:55:00,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:55:00,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:55:00,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:55:00,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:55:00,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:55:00,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:55:00,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:55:00,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:55:00,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:55:00,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:55:00,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:55:00,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:55:00,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:55:00,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:55:00,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:55:00,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:55:00,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:55:00,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:55:00,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:55:00,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:55:00,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:55:00,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:55:00,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:55:00,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:55:00,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:55:00,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:55:00,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:55:00,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:55:00,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:55:00,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:55:00,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:55:00,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:55:00,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:55:00,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:55:00,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:55:00,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:55:00,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:55:00,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:55:00,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:55:00,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:55:00,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:55:00,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:55:00,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:55:00,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:55:00,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:55:00,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:55:00,695 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:55:00,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:55:00,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:55:00,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:55:00,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:55:00,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:55:00,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:55:00,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:55:00,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:55:00,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:55:00,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:55:00,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:55:00,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:55:00,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:55:00,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:55:00,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:55:00,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:55:00,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:55:00,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:55:00,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:55:00,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:55:00,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:55:00,700 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:55:00,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:55:00,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:55:00,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:55:00,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7670ede459996daea4f0d5b6d4f8f7722cb2c07f35d54c8d0ca4957e40998d [2021-12-06 18:55:00,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:55:00,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:55:00,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:55:00,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:55:00,929 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:55:00,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-12-06 18:55:00,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/data/c75618f77/97c882755a55408bac69c361d56ef6da/FLAGb068b69e2 [2021-12-06 18:55:01,329 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:55:01,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-12-06 18:55:01,334 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/data/c75618f77/97c882755a55408bac69c361d56ef6da/FLAGb068b69e2 [2021-12-06 18:55:01,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/data/c75618f77/97c882755a55408bac69c361d56ef6da [2021-12-06 18:55:01,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:55:01,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:55:01,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:55:01,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:55:01,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:55:01,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a10a6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01, skipping insertion in model container [2021-12-06 18:55:01,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:55:01,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:55:01,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-12-06 18:55:01,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:55:01,492 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:55:01,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-12-06 18:55:01,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:55:01,513 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:55:01,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01 WrapperNode [2021-12-06 18:55:01,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:55:01,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:55:01,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:55:01,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:55:01,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,538 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2021-12-06 18:55:01,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:55:01,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:55:01,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:55:01,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:55:01,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:55:01,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:55:01,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:55:01,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:55:01,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (1/1) ... [2021-12-06 18:55:01,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:55:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:01,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:55:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:55:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:55:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:55:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:55:01,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:55:01,680 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:55:01,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:55:01,761 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:55:01,766 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:55:01,767 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:55:01,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:55:01 BoogieIcfgContainer [2021-12-06 18:55:01,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:55:01,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:55:01,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:55:01,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:55:01,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:55:01" (1/3) ... [2021-12-06 18:55:01,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b157d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:55:01, skipping insertion in model container [2021-12-06 18:55:01,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:55:01" (2/3) ... [2021-12-06 18:55:01,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b157d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:55:01, skipping insertion in model container [2021-12-06 18:55:01,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:55:01" (3/3) ... [2021-12-06 18:55:01,778 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-12-06 18:55:01,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:55:01,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:55:01,832 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:55:01,840 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:55:01,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:55:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:55:01,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:01,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:55:01,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-06 18:55:01,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828230284] [2021-12-06 18:55:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:01,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:01,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:01,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828230284] [2021-12-06 18:55:01,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828230284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:01,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:01,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:55:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110601199] [2021-12-06 18:55:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:55:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:55:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:55:02,001 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:02,011 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-06 18:55:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:55:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:55:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:02,018 INFO L225 Difference]: With dead ends: 21 [2021-12-06 18:55:02,018 INFO L226 Difference]: Without dead ends: 9 [2021-12-06 18:55:02,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:55:02,023 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-06 18:55:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-06 18:55:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-06 18:55:02,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-06 18:55:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:02,046 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-06 18:55:02,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-06 18:55:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:55:02,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:02,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:55:02,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:55:02,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-12-06 18:55:02,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598702935] [2021-12-06 18:55:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:02,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:02,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:02,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598702935] [2021-12-06 18:55:02,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598702935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:02,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:02,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:55:02,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887315967] [2021-12-06 18:55:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:02,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:55:02,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:55:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:55:02,121 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:02,144 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-12-06 18:55:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:55:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:55:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:02,145 INFO L225 Difference]: With dead ends: 14 [2021-12-06 18:55:02,145 INFO L226 Difference]: Without dead ends: 10 [2021-12-06 18:55:02,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:55:02,147 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:02,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-06 18:55:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-06 18:55:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-06 18:55:02,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-06 18:55:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-06 18:55:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-06 18:55:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:55:02,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:02,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:02,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:55:02,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-12-06 18:55:02,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659007557] [2021-12-06 18:55:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:02,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:02,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:02,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659007557] [2021-12-06 18:55:02,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659007557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:55:02,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:55:02,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:55:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296689149] [2021-12-06 18:55:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:55:02,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:55:02,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:55:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:55:02,181 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:02,191 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-12-06 18:55:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:55:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:55:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:02,192 INFO L225 Difference]: With dead ends: 19 [2021-12-06 18:55:02,192 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 18:55:02,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:55:02,200 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:02,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 18:55:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-12-06 18:55:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-12-06 18:55:02,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-12-06 18:55:02,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:02,205 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-12-06 18:55:02,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-12-06 18:55:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:55:02,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:02,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:02,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:55:02,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -275361512, now seen corresponding path program 1 times [2021-12-06 18:55:02,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316789658] [2021-12-06 18:55:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:02,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:02,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316789658] [2021-12-06 18:55:02,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316789658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508486991] [2021-12-06 18:55:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:02,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:02,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:55:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:55:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:02,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508486991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:02,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:02,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-06 18:55:02,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729777307] [2021-12-06 18:55:02,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:55:02,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:55:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:55:02,635 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:02,754 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-06 18:55:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:55:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:55:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:02,755 INFO L225 Difference]: With dead ends: 23 [2021-12-06 18:55:02,755 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 18:55:02,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:55:02,757 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:02,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 18:55:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-06 18:55:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-06 18:55:02,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-12-06 18:55:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-06 18:55:02,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-06 18:55:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:55:02,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:02,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:02,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:55:02,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:02,965 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1631725588, now seen corresponding path program 1 times [2021-12-06 18:55:02,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063995073] [2021-12-06 18:55:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:02,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:03,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:03,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063995073] [2021-12-06 18:55:03,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063995073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239325007] [2021-12-06 18:55:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:03,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:03,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:03,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:55:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:55:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:03,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239325007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:03,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-06 18:55:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828995596] [2021-12-06 18:55:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:03,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:55:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:55:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:03,367 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:03,389 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-12-06 18:55:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:55:03,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:55:03,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:03,390 INFO L225 Difference]: With dead ends: 25 [2021-12-06 18:55:03,390 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 18:55:03,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:55:03,391 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:03,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:55:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 18:55:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-06 18:55:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-06 18:55:03,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-12-06 18:55:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-06 18:55:03,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-06 18:55:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:55:03,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:03,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:03,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:55:03,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:03,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1721520424, now seen corresponding path program 2 times [2021-12-06 18:55:03,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:03,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804183342] [2021-12-06 18:55:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:03,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:55:03,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804183342] [2021-12-06 18:55:03,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804183342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816648494] [2021-12-06 18:55:03,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:55:03,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:03,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:03,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:55:03,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:55:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:55:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:03,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816648494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:04,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:04,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2021-12-06 18:55:04,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331046072] [2021-12-06 18:55:04,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:04,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:55:04,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:55:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:55:04,208 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:04,508 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-06 18:55:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:55:04,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 18:55:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:04,509 INFO L225 Difference]: With dead ends: 29 [2021-12-06 18:55:04,509 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 18:55:04,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:55:04,510 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:04,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:55:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 18:55:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-12-06 18:55:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-06 18:55:04,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2021-12-06 18:55:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:04,514 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-06 18:55:04,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-06 18:55:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 18:55:04,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:04,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:04,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:55:04,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:55:04,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1928524372, now seen corresponding path program 2 times [2021-12-06 18:55:04,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:04,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975204631] [2021-12-06 18:55:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:04,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:55:04,761 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 18:55:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:55:04,833 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 18:55:04,833 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 18:55:04,834 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 18:55:04,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:55:04,840 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2021-12-06 18:55:04,843 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:55:04,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:55:04 BoogieIcfgContainer [2021-12-06 18:55:04,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:55:04,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:55:04,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:55:04,864 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:55:04,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:55:01" (3/4) ... [2021-12-06 18:55:04,866 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 18:55:04,893 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 18:55:04,893 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:55:04,894 INFO L158 Benchmark]: Toolchain (without parser) took 3546.91ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 41.8MB in the beginning and 98.7MB in the end (delta: -56.9MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,894 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 79.7MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:55:04,894 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.08ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.6MB in the beginning and 76.7MB in the end (delta: -35.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,895 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.77ms. Allocated memory is still 100.7MB. Free memory was 76.7MB in the beginning and 75.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:55:04,895 INFO L158 Benchmark]: Boogie Preprocessor took 15.27ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 74.6MB in the end (delta: 814.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,895 INFO L158 Benchmark]: RCFGBuilder took 213.98ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 65.8MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,895 INFO L158 Benchmark]: TraceAbstraction took 3092.60ms. Allocated memory is still 100.7MB. Free memory was 65.4MB in the beginning and 29.4MB in the end (delta: 36.0MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,896 INFO L158 Benchmark]: Witness Printer took 29.40ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 29.4MB in the beginning and 98.7MB in the end (delta: -69.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:55:04,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 79.7MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.08ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.6MB in the beginning and 76.7MB in the end (delta: -35.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.77ms. Allocated memory is still 100.7MB. Free memory was 76.7MB in the beginning and 75.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.27ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 74.6MB in the end (delta: 814.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 213.98ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 65.8MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3092.60ms. Allocated memory is still 100.7MB. Free memory was 65.4MB in the beginning and 29.4MB in the end (delta: 36.0MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * Witness Printer took 29.40ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 29.4MB in the beginning and 98.7MB in the end (delta: -69.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=1, n=4, n=2] [L26] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L24] i++ VAL [i=2, n=4, n=2] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=3, n=6, n=4] [L26] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L24] i++ VAL [i=4, n=6, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=4, n=8, n=4] [L26] COND TRUE i==4 [L26] sn=-10 VAL [i=4, n=4, n=-10] [L24] i++ VAL [i=5, n=4, n=-10] [L24] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 123 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 80 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 308 IncrementalHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 43 mSDtfsCounter, 308 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 860 SizeOfPredicates, 10 NumberOfNonLiveVariables, 144 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 11/55 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! [2021-12-06 18:55:04,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ab7edee-9f43-41b7-802f-82141bce4d7d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE