./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh --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 e0a16588b251f5de7b3febde43795c7086835cc989637b8bd82aa8d6af355c6b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:17:13,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:17:13,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:17:13,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:17:13,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:17:13,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:17:13,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:17:13,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:17:13,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:17:13,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:17:13,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:17:13,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:17:13,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:17:13,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:17:13,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:17:13,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:17:13,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:17:13,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:17:13,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:17:13,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:17:13,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:17:13,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:17:13,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:17:13,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:17:13,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:17:13,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:17:13,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:17:13,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:17:13,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:17:13,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:17:13,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:17:13,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:17:13,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:17:13,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:17:13,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:17:13,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:17:13,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:17:13,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:17:13,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:17:13,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:17:13,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:17:13,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:17:13,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:17:13,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:17:13,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:17:13,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:17:13,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:17:13,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:17:13,527 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:17:13,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:17:13,527 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:17:13,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:17:13,528 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:17:13,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:17:13,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:17:13,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:17:13,528 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:17:13,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:17:13,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:17:13,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:17:13,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:17:13,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:17:13,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:17:13,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:17:13,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:17:13,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:17:13,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:17:13,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:17:13,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:17:13,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:17:13,532 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:17:13,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:17:13,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:17:13,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:17:13,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:17:13,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:17:13,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:17:13,533 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_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0a16588b251f5de7b3febde43795c7086835cc989637b8bd82aa8d6af355c6b [2022-12-14 10:17:13,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:17:13,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:17:13,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:17:13,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:17:13,729 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:17:13,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2022-12-14 10:17:16,340 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:17:16,475 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:17:16,476 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2022-12-14 10:17:16,480 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/data/d9b65933d/677554a2a5ef4965b73883bc21263e75/FLAG8826752eb [2022-12-14 10:17:16,490 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/data/d9b65933d/677554a2a5ef4965b73883bc21263e75 [2022-12-14 10:17:16,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:17:16,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:17:16,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:17:16,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:17:16,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:17:16,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4128a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16, skipping insertion in model container [2022-12-14 10:17:16,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:17:16,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:17:16,610 WARN L237 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_3330df5c-eb81-48ee-a53e-6dda80a58772/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2022-12-14 10:17:16,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:17:16,628 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:17:16,639 WARN L237 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_3330df5c-eb81-48ee-a53e-6dda80a58772/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2022-12-14 10:17:16,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:17:16,654 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:17:16,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16 WrapperNode [2022-12-14 10:17:16,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:17:16,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:17:16,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:17:16,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:17:16,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,681 INFO L138 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-12-14 10:17:16,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:17:16,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:17:16,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:17:16,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:17:16,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:17:16,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:17:16,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:17:16,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:17:16,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (1/1) ... [2022-12-14 10:17:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:17:16,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:16,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:17:16,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:17:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:17:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:17:16,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:17:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:17:16,811 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:17:16,812 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:17:16,932 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:17:16,963 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:17:16,963 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 10:17:16,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:17:16 BoogieIcfgContainer [2022-12-14 10:17:16,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:17:16,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:17:16,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:17:16,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:17:16,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:17:16" (1/3) ... [2022-12-14 10:17:16,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b566c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:17:16, skipping insertion in model container [2022-12-14 10:17:16,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:17:16" (2/3) ... [2022-12-14 10:17:16,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b566c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:17:16, skipping insertion in model container [2022-12-14 10:17:16,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:17:16" (3/3) ... [2022-12-14 10:17:16,973 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2022-12-14 10:17:16,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:17:16,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:17:17,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:17:17,044 INFO L357 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@29fe5653, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:17:17,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:17:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:17:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:17:17,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:17,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:17:17,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1683664131, now seen corresponding path program 1 times [2022-12-14 10:17:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:17,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819841416] [2022-12-14 10:17:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:17:17,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:17,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819841416] [2022-12-14 10:17:17,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819841416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:17:17,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:17:17,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:17:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449548249] [2022-12-14 10:17:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:17:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:17:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:17:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:17:17,335 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:17,414 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2022-12-14 10:17:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:17:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:17:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:17,423 INFO L225 Difference]: With dead ends: 50 [2022-12-14 10:17:17,424 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 10:17:17,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:17:17,428 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:17,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:17:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 10:17:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-12-14 10:17:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:17:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-12-14 10:17:17,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 8 [2022-12-14 10:17:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:17,456 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-12-14 10:17:17,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-12-14 10:17:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:17:17,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:17,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:17:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:17:17,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2119988144, now seen corresponding path program 1 times [2022-12-14 10:17:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:17,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551279830] [2022-12-14 10:17:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:17:17,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:17,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551279830] [2022-12-14 10:17:17,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551279830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:17:17,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:17:17,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:17:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331055896] [2022-12-14 10:17:17,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:17:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:17:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:17:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:17:17,702 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:17,801 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-12-14 10:17:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:17:17,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:17:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:17,802 INFO L225 Difference]: With dead ends: 34 [2022-12-14 10:17:17,802 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 10:17:17,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:17:17,804 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:17,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:17:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 10:17:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-12-14 10:17:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:17:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 10:17:17,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-12-14 10:17:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:17,808 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 10:17:17,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 10:17:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:17:17,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:17,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:17:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:17:17,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1520981322, now seen corresponding path program 1 times [2022-12-14 10:17:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035063850] [2022-12-14 10:17:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:17:17,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035063850] [2022-12-14 10:17:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035063850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:17:17,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:17:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:17:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344697431] [2022-12-14 10:17:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:17:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:17:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:17:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:17:17,985 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:18,052 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 10:17:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:17:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 10:17:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:18,053 INFO L225 Difference]: With dead ends: 27 [2022-12-14 10:17:18,053 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 10:17:18,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:17:18,054 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 64 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:17:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 10:17:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 10:17:18,055 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) [2022-12-14 10:17:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 10:17:18,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-12-14 10:17:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:18,056 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 10:17:18,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:17:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 10:17:18,056 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 10:17:18,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:17:18,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:17:18,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 10:17:18,071 INFO L902 garLoopResultBuilder]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2022-12-14 10:17:18,071 INFO L895 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (not (= (* (div |ULTIMATE.start_printOdd_~i#1| 2) 2) |ULTIMATE.start_printOdd_~i#1|)) [2022-12-14 10:17:18,071 INFO L899 garLoopResultBuilder]: For program point L19-1(lines 18 20) no Hoare annotation was computed. [2022-12-14 10:17:18,071 INFO L899 garLoopResultBuilder]: For program point L32-2(lines 32 38) no Hoare annotation was computed. [2022-12-14 10:17:18,071 INFO L902 garLoopResultBuilder]: At program point L32-3(lines 32 38) the Hoare annotation is: true [2022-12-14 10:17:18,072 INFO L895 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (<= |ULTIMATE.start_printEven_~i#1| (* (div |ULTIMATE.start_printEven_~i#1| 2) 2)) [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point L16-1(lines 15 17) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point L41(lines 41 44) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point L34(lines 34 37) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point L39-2(lines 39 45) no Hoare annotation was computed. [2022-12-14 10:17:18,072 INFO L902 garLoopResultBuilder]: At program point L39-3(lines 39 45) the Hoare annotation is: true [2022-12-14 10:17:18,072 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-12-14 10:17:18,073 INFO L899 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2022-12-14 10:17:18,073 INFO L899 garLoopResultBuilder]: For program point L14-3(line 14) no Hoare annotation was computed. [2022-12-14 10:17:18,073 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(line 14) no Hoare annotation was computed. [2022-12-14 10:17:18,073 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line 14) the Hoare annotation is: true [2022-12-14 10:17:18,073 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-12-14 10:17:18,076 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 10:17:18,078 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:17:18,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:17:18 BoogieIcfgContainer [2022-12-14 10:17:18,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:17:18,085 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:17:18,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:17:18,085 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:17:18,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:17:16" (3/4) ... [2022-12-14 10:17:18,088 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 10:17:18,093 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 10:17:18,096 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-12-14 10:17:18,096 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 10:17:18,096 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 10:17:18,096 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 10:17:18,121 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 10:17:18,121 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:17:18,122 INFO L158 Benchmark]: Toolchain (without parser) took 1629.02ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 73.1MB in the beginning and 55.2MB in the end (delta: 17.9MB). Peak memory consumption was 42.0MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,122 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 86.9MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:17:18,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.20ms. Allocated memory is still 113.2MB. Free memory was 73.1MB in the beginning and 62.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,123 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.76ms. Allocated memory is still 113.2MB. Free memory was 62.9MB in the beginning and 61.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,123 INFO L158 Benchmark]: Boogie Preprocessor took 17.03ms. Allocated memory is still 113.2MB. Free memory was 61.2MB in the beginning and 59.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:17:18,123 INFO L158 Benchmark]: RCFGBuilder took 266.57ms. Allocated memory is still 113.2MB. Free memory was 59.9MB in the beginning and 47.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,123 INFO L158 Benchmark]: TraceAbstraction took 1117.53ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 46.5MB in the beginning and 58.3MB in the end (delta: -11.8MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,124 INFO L158 Benchmark]: Witness Printer took 36.00ms. Allocated memory is still 136.3MB. Free memory was 57.3MB in the beginning and 55.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:17:18,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 86.9MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.20ms. Allocated memory is still 113.2MB. Free memory was 73.1MB in the beginning and 62.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.76ms. Allocated memory is still 113.2MB. Free memory was 62.9MB in the beginning and 61.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.03ms. Allocated memory is still 113.2MB. Free memory was 61.2MB in the beginning and 59.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.57ms. Allocated memory is still 113.2MB. Free memory was 59.9MB in the beginning and 47.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1117.53ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 46.5MB in the beginning and 58.3MB in the end (delta: -11.8MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Witness Printer took 36.00ms. Allocated memory is still 136.3MB. Free memory was 57.3MB in the beginning and 55.2MB in the end (delta: 2.1MB). 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 - PositiveResult [Line: 14]: 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 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 185 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 130 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 153 IncrementalHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 55 mSDtfsCounter, 153 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, InterpolantAutomatonStates: 20, 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, 3 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 9 PreInvPairs, 18 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 89 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 3/3 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-14 10:17:18,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3330df5c-eb81-48ee-a53e-6dda80a58772/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE