./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/nec40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/nec40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 .............................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:21:35,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:21:35,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:21:35,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:21:35,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:21:35,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:21:35,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:21:35,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:21:35,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:21:35,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:21:35,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:21:35,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:21:35,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:21:35,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:21:35,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:21:35,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:21:35,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:21:35,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:21:35,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:21:35,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:21:35,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:21:35,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:21:35,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:21:35,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:21:35,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:21:35,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:21:35,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:21:35,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:21:35,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:21:35,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:21:35,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:21:35,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:21:35,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:21:35,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:21:35,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:21:35,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:21:35,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:21:35,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:21:35,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:21:35,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:21:35,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:21:35,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:21:35,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:21:35,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:21:35,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:21:35,648 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:21:35,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:21:35,649 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:21:35,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:21:35,649 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:21:35,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:21:35,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:21:35,655 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:21:35,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:21:35,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:21:35,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:21:35,656 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:21:35,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:21:35,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:21:35,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:21:35,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:21:35,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:21:35,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:21:35,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:21:35,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:21:35,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:21:35,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:21:35,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:21:35,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:21:35,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:21:35,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:21:35,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:21:35,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:35,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:21:35,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:21:35,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:21:35,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:21:35,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:21:35,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:21:35,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:21:35,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:21:35,665 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_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 [2021-10-16 02:21:36,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:21:36,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:21:36,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:21:36,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:21:36,049 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:21:36,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops/nec40.c [2021-10-16 02:21:36,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/data/56a0f871d/495e57da32d74c24afd2244691911268/FLAGf262f19f3 [2021-10-16 02:21:36,683 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:21:36,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/sv-benchmarks/c/loops/nec40.c [2021-10-16 02:21:36,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/data/56a0f871d/495e57da32d74c24afd2244691911268/FLAGf262f19f3 [2021-10-16 02:21:37,046 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/data/56a0f871d/495e57da32d74c24afd2244691911268 [2021-10-16 02:21:37,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:21:37,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:21:37,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:37,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:21:37,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:21:37,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bfb042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37, skipping insertion in model container [2021-10-16 02:21:37,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:21:37,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:21:37,413 WARN L228 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_18eb66ea-bdd3-45b9-bde5-7d24982217a5/sv-benchmarks/c/loops/nec40.c[317,330] [2021-10-16 02:21:37,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:37,463 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:21:37,487 WARN L228 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_18eb66ea-bdd3-45b9-bde5-7d24982217a5/sv-benchmarks/c/loops/nec40.c[317,330] [2021-10-16 02:21:37,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:21:37,520 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:21:37,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37 WrapperNode [2021-10-16 02:21:37,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:21:37,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:37,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:21:37,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:21:37,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:21:37,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:21:37,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:21:37,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:21:37,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:21:37,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:21:37,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:21:37,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:21:37,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (1/1) ... [2021-10-16 02:21:37,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:21:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:37,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:21:37,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:21:37,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:21:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:21:37,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:21:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:21:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:21:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:21:38,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:21:38,032 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:21:38,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:38 BoogieIcfgContainer [2021-10-16 02:21:38,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:21:38,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:21:38,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:21:38,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:21:38,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:21:37" (1/3) ... [2021-10-16 02:21:38,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d1ce2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:38, skipping insertion in model container [2021-10-16 02:21:38,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:21:37" (2/3) ... [2021-10-16 02:21:38,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d1ce2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:21:38, skipping insertion in model container [2021-10-16 02:21:38,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:38" (3/3) ... [2021-10-16 02:21:38,046 INFO L111 eAbstractionObserver]: Analyzing ICFG nec40.c [2021-10-16 02:21:38,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:21:38,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:21:38,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:21:38,143 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-16 02:21:38,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:21:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-16 02:21:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:21:38,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:38,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:38,169 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1740528238, now seen corresponding path program 1 times [2021-10-16 02:21:38,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:21:38,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98001818] [2021-10-16 02:21:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:38,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:21:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:38,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:21:38,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98001818] [2021-10-16 02:21:38,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98001818] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:38,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:38,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:21:38,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498623289] [2021-10-16 02:21:38,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:21:38,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:21:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:21:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:21:38,469 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-16 02:21:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:38,487 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-10-16 02:21:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:21:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-10-16 02:21:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:38,501 INFO L225 Difference]: With dead ends: 19 [2021-10-16 02:21:38,501 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 02:21:38,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:21:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 02:21:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 02:21:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2021-10-16 02:21:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-16 02:21:38,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-16 02:21:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:38,545 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-16 02:21:38,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-16 02:21:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-16 02:21:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:21:38,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:38,547 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:38,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:21:38,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash -213996761, now seen corresponding path program 1 times [2021-10-16 02:21:38,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:21:38,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129225321] [2021-10-16 02:21:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:38,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:21:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:38,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:21:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129225321] [2021-10-16 02:21:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129225321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:38,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:38,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:21:38,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182829782] [2021-10-16 02:21:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:21:38,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:21:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:21:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:21:38,721 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-16 02:21:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:38,741 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-16 02:21:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:21:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-10-16 02:21:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:38,742 INFO L225 Difference]: With dead ends: 17 [2021-10-16 02:21:38,743 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:21:38,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:21:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:21:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:21:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-10-16 02:21:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-16 02:21:38,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-16 02:21:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:38,748 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-16 02:21:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-16 02:21:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-16 02:21:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:21:38,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:38,750 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:38,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:21:38,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:38,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash 37211490, now seen corresponding path program 1 times [2021-10-16 02:21:38,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:21:38,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839047044] [2021-10-16 02:21:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:38,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:21:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:38,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:21:38,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839047044] [2021-10-16 02:21:38,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839047044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:38,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:38,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:21:38,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142149464] [2021-10-16 02:21:38,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:21:38,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:21:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:21:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:21:38,918 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-10-16 02:21:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:38,938 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-16 02:21:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:21:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 10 [2021-10-16 02:21:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:38,939 INFO L225 Difference]: With dead ends: 11 [2021-10-16 02:21:38,939 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:21:38,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:21:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:21:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:21:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-16 02:21:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:21:38,942 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-10-16 02:21:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:38,942 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:21:38,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-10-16 02:21:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:21:38,944 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:21:38,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:21:38,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:21:38,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:21:38,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:38,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:38,986 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:21:38,986 INFO L857 garLoopResultBuilder]: For program point L27(lines 27 28) no Hoare annotation was computed. [2021-10-16 02:21:38,987 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-16 02:21:38,987 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:21:38,987 INFO L857 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-10-16 02:21:38,988 INFO L860 garLoopResultBuilder]: At program point L26-1(lines 26 28) the Hoare annotation is: true [2021-10-16 02:21:38,990 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-16 02:21:38,993 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 23) no Hoare annotation was computed. [2021-10-16 02:21:38,993 INFO L853 garLoopResultBuilder]: At program point L20-3(lines 20 23) the Hoare annotation is: (and (= (select (select |#memory_int| |~#x~0.base|) (+ ~i~0 |~#x~0.offset|)) 0) (not (= |~#x~0.base| |~#y~0.base|)) (= ~i~0 0)) [2021-10-16 02:21:38,993 INFO L857 garLoopResultBuilder]: For program point L20-4(lines 20 23) no Hoare annotation was computed. [2021-10-16 02:21:38,994 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-16 02:21:38,999 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:21:39,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:21:39 BoogieIcfgContainer [2021-10-16 02:21:39,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:21:39,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:21:39,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:21:39,025 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:21:39,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:21:38" (3/4) ... [2021-10-16 02:21:39,034 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:21:39,047 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-16 02:21:39,048 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:21:39,048 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-16 02:21:39,049 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:21:39,111 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:21:39,111 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:21:39,113 INFO L168 Benchmark]: Toolchain (without parser) took 2059.64 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 47.4 MB in the beginning and 55.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,113 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:39,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.18 ms. Allocated memory is still 88.1 MB. Free memory was 47.2 MB in the beginning and 64.4 MB in the end (delta: -17.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.62 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 62.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,114 INFO L168 Benchmark]: Boogie Preprocessor took 43.96 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 61.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:39,115 INFO L168 Benchmark]: RCFGBuilder took 422.02 ms. Allocated memory is still 88.1 MB. Free memory was 61.7 MB in the beginning and 50.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,116 INFO L168 Benchmark]: TraceAbstraction took 985.06 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.9 MB in the beginning and 58.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,116 INFO L168 Benchmark]: Witness Printer took 86.35 ms. Allocated memory is still 107.0 MB. Free memory was 58.1 MB in the beginning and 55.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:39,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 468.18 ms. Allocated memory is still 88.1 MB. Free memory was 47.2 MB in the beginning and 64.4 MB in the end (delta: -17.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.62 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 62.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.96 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 61.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 422.02 ms. Allocated memory is still 88.1 MB. Free memory was 61.7 MB in the beginning and 50.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 985.06 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.9 MB in the beginning and 58.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Witness Printer took 86.35 ms. Allocated memory is still 107.0 MB. Free memory was 58.1 MB in the beginning and 55.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 866.2ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 13.2ms, AutomataDifference: 117.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 37.2ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 1 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 18 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 20.3ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 8.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 19.0ms SsaConstructionTime, 127.6ms SatisfiabilityAnalysisTime, 287.0ms InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 59 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (unknown-#memory_int-unknown[x][i + x] == 0 && !(x == y)) && i == 0 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:21:39,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18eb66ea-bdd3-45b9-bde5-7d24982217a5/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...