./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P --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 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:48:09,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:48:09,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:48:09,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:48:09,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:48:09,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:48:09,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:48:09,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:48:09,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:48:09,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:48:09,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:48:09,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:48:09,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:48:09,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:48:09,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:48:09,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:48:09,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:48:09,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:48:09,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:48:09,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:48:09,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:48:09,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:48:09,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:48:09,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:48:09,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:48:09,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:48:09,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:48:09,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:48:09,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:48:09,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:48:09,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:48:09,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:48:09,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:48:09,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:48:09,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:48:09,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:48:09,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:48:09,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:48:09,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:48:09,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:48:09,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:48:09,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:48:09,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:48:09,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:48:09,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:48:09,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:48:09,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:48:09,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:48:09,222 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:48:09,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:48:09,222 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:48:09,223 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:48:09,224 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:48:09,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:48:09,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:48:09,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:48:09,224 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:48:09,225 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:48:09,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:48:09,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:48:09,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:48:09,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:48:09,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:48:09,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:48:09,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:48:09,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:48:09,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:48:09,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:48:09,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:48:09,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:48:09,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:48:09,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:48:09,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:48:09,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:48:09,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:48:09,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:48:09,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:48:09,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:48:09,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:48:09,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:48:09,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:48:09,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:48:09,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:48:09,232 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_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e [2021-11-20 23:48:09,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:48:09,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:48:09,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:48:09,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:48:09,531 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:48:09,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2021-11-20 23:48:09,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/data/152ce988a/b71b698621384f07ba5b7b6b45ec248a/FLAGa7e341886 [2021-11-20 23:48:10,059 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:48:10,060 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/sv-benchmarks/c/ldv-regression/stateful_check.c [2021-11-20 23:48:10,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/data/152ce988a/b71b698621384f07ba5b7b6b45ec248a/FLAGa7e341886 [2021-11-20 23:48:10,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/data/152ce988a/b71b698621384f07ba5b7b6b45ec248a [2021-11-20 23:48:10,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:48:10,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:48:10,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:48:10,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:48:10,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:48:10,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127af323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10, skipping insertion in model container [2021-11-20 23:48:10,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:48:10,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:48:10,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2021-11-20 23:48:10,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:48:10,671 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:48:10,680 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2021-11-20 23:48:10,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:48:10,701 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:48:10,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10 WrapperNode [2021-11-20 23:48:10,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:48:10,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:48:10,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:48:10,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:48:10,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,739 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 100 [2021-11-20 23:48:10,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:48:10,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:48:10,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:48:10,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:48:10,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:48:10,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:48:10,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:48:10,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:48:10,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (1/1) ... [2021-11-20 23:48:10,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:48:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:10,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:48:10,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:48:10,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:48:10,869 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-11-20 23:48:10,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-11-20 23:48:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:48:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-20 23:48:10,870 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-20 23:48:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:48:10,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:48:10,933 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:48:10,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:48:11,163 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:48:11,262 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:48:11,262 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:48:11,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:48:11 BoogieIcfgContainer [2021-11-20 23:48:11,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:48:11,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:48:11,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:48:11,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:48:11,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:48:10" (1/3) ... [2021-11-20 23:48:11,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf18e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:48:11, skipping insertion in model container [2021-11-20 23:48:11,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:10" (2/3) ... [2021-11-20 23:48:11,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf18e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:48:11, skipping insertion in model container [2021-11-20 23:48:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:48:11" (3/3) ... [2021-11-20 23:48:11,287 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2021-11-20 23:48:11,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:48:11,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:48:11,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:48:11,387 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-11-20 23:48:11,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:48:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:48:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:48:11,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:11,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:48:11,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 851666694, now seen corresponding path program 1 times [2021-11-20 23:48:11,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:11,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705375516] [2021-11-20 23:48:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:11,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:11,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705375516] [2021-11-20 23:48:11,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705375516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:48:11,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:48:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:48:11,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808082400] [2021-11-20 23:48:11,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:11,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:48:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:48:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:48:11,649 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 23:48:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:11,722 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-11-20 23:48:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:48:11,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2021-11-20 23:48:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:11,742 INFO L225 Difference]: With dead ends: 58 [2021-11-20 23:48:11,743 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 23:48:11,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:48:11,753 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:11,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:48:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 23:48:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 23:48:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 23:48:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-11-20 23:48:11,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 6 [2021-11-20 23:48:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:11,812 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-11-20 23:48:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 23:48:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-11-20 23:48:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:48:11,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:11,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:48:11,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2086219880, now seen corresponding path program 1 times [2021-11-20 23:48:11,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460911025] [2021-11-20 23:48:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:11,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:11,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460911025] [2021-11-20 23:48:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460911025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:48:11,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:48:11,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:48:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179035353] [2021-11-20 23:48:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:11,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:48:11,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:48:11,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:48:11,854 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-20 23:48:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:11,908 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2021-11-20 23:48:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:48:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-11-20 23:48:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:11,911 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:48:11,911 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 23:48:11,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:48:11,914 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:11,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:48:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 23:48:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 23:48:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:48:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2021-11-20 23:48:11,933 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 7 [2021-11-20 23:48:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:11,933 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2021-11-20 23:48:11,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-20 23:48:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2021-11-20 23:48:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:48:11,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:11,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:11,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:48:11,936 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1367247570, now seen corresponding path program 1 times [2021-11-20 23:48:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458425638] [2021-11-20 23:48:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:11,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:11,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458425638] [2021-11-20 23:48:11,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458425638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:48:11,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:48:11,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:48:11,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916802797] [2021-11-20 23:48:11,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:11,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:48:11,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:48:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:48:11,992 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:12,029 INFO L93 Difference]: Finished difference Result 98 states and 145 transitions. [2021-11-20 23:48:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:48:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:48:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:12,031 INFO L225 Difference]: With dead ends: 98 [2021-11-20 23:48:12,031 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 23:48:12,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:48:12,034 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:12,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:48:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 23:48:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-20 23:48:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 49 states have internal predecessors, (70), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:48:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 83 transitions. [2021-11-20 23:48:12,048 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 83 transitions. Word has length 17 [2021-11-20 23:48:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:12,048 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 83 transitions. [2021-11-20 23:48:12,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 83 transitions. [2021-11-20 23:48:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:48:12,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:12,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:12,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:48:12,051 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -258857559, now seen corresponding path program 1 times [2021-11-20 23:48:12,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517398005] [2021-11-20 23:48:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:12,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:12,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:12,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517398005] [2021-11-20 23:48:12,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517398005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348833524] [2021-11-20 23:48:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:12,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:12,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:48:12,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:48:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:12,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:48:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:48:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:48:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:48:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:48:12,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348833524] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:12,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:48:12,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-11-20 23:48:12,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474601178] [2021-11-20 23:48:12,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:48:12,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:48:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:48:12,884 INFO L87 Difference]: Start difference. First operand 56 states and 83 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:12,919 INFO L93 Difference]: Finished difference Result 146 states and 220 transitions. [2021-11-20 23:48:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:48:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-20 23:48:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:12,922 INFO L225 Difference]: With dead ends: 146 [2021-11-20 23:48:12,922 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 23:48:12,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:48:12,924 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:12,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:48:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 23:48:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-20 23:48:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 81 states have internal predecessors, (120), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:48:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2021-11-20 23:48:12,940 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 21 [2021-11-20 23:48:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:12,941 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2021-11-20 23:48:12,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2021-11-20 23:48:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:48:12,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:12,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:12,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:48:13,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:13,159 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 462524107, now seen corresponding path program 1 times [2021-11-20 23:48:13,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:13,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483838746] [2021-11-20 23:48:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:13,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:48:13,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:13,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483838746] [2021-11-20 23:48:13,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483838746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:13,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432337614] [2021-11-20 23:48:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:13,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:13,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:48:13,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:48:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:48:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:48:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:48:13,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:48:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:48:13,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432337614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:48:13,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587057185] [2021-11-20 23:48:13,794 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:48:13,794 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:48:13,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:48:13,804 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:48:13,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:48:15,976 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:48:16,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [587057185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:48:16,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:48:16,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 3, 4] total 15 [2021-11-20 23:48:16,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791388569] [2021-11-20 23:48:16,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:48:16,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:48:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:48:16,436 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:16,730 INFO L93 Difference]: Finished difference Result 215 states and 322 transitions. [2021-11-20 23:48:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:48:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-20 23:48:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:16,733 INFO L225 Difference]: With dead ends: 215 [2021-11-20 23:48:16,733 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:48:16,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:48:16,735 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:16,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 103 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:48:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:48:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-11-20 23:48:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.5272727272727273) internal successors, (168), 113 states have internal predecessors, (168), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:48:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 181 transitions. [2021-11-20 23:48:16,758 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 181 transitions. Word has length 27 [2021-11-20 23:48:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 181 transitions. [2021-11-20 23:48:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 181 transitions. [2021-11-20 23:48:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:48:16,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:16,763 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:16,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:48:16,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:16,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash -369026430, now seen corresponding path program 1 times [2021-11-20 23:48:16,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:16,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073537419] [2021-11-20 23:48:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:16,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:48:17,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073537419] [2021-11-20 23:48:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073537419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564304618] [2021-11-20 23:48:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:17,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:17,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:48:17,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:48:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:48:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:48:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:48:17,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:48:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:48:17,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564304618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:48:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376658252] [2021-11-20 23:48:17,548 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:48:17,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:48:17,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:48:17,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:48:17,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:48:19,515 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 36 for LOIs [2021-11-20 23:48:19,640 INFO L197 IcfgInterpreter]: Interpreting procedure __blast_assert with input of size 17 for LOIs [2021-11-20 23:48:19,656 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:48:20,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:48:20,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:48:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 11 [2021-11-20 23:48:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497883834] [2021-11-20 23:48:20,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:48:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:48:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:48:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:48:20,460 INFO L87 Difference]: Start difference. First operand 120 states and 181 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:48:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:20,620 INFO L93 Difference]: Finished difference Result 283 states and 431 transitions. [2021-11-20 23:48:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:48:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-20 23:48:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:20,623 INFO L225 Difference]: With dead ends: 283 [2021-11-20 23:48:20,624 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 23:48:20,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:48:20,630 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:20,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 177 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:48:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 23:48:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 88. [2021-11-20 23:48:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 81 states have internal predecessors, (120), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:48:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2021-11-20 23:48:20,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 32 [2021-11-20 23:48:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:20,657 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2021-11-20 23:48:20,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:48:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2021-11-20 23:48:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:48:20,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:20,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:48:20,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:48:20,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:20,877 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:48:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1596101560, now seen corresponding path program 2 times [2021-11-20 23:48:20,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:20,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607618402] [2021-11-20 23:48:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:20,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:48:20,890 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:48:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:48:20,961 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:48:20,963 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:48:20,965 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:48:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:48:20,970 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2021-11-20 23:48:20,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:48:21,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:48:21 BoogieIcfgContainer [2021-11-20 23:48:21,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:48:21,029 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:48:21,029 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:48:21,029 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:48:21,030 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:48:11" (3/4) ... [2021-11-20 23:48:21,032 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:48:21,077 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:48:21,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:48:21,078 INFO L158 Benchmark]: Toolchain (without parser) took 10632.74ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 62.8MB in the beginning and 109.2MB in the end (delta: -46.4MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,079 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory is still 52.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:48:21,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.79ms. Allocated memory is still 96.5MB. Free memory was 62.6MB in the beginning and 71.7MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.92ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,080 INFO L158 Benchmark]: Boogie Preprocessor took 22.42ms. Allocated memory is still 96.5MB. Free memory was 70.2MB in the beginning and 69.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:48:21,080 INFO L158 Benchmark]: RCFGBuilder took 501.69ms. Allocated memory is still 96.5MB. Free memory was 69.0MB in the beginning and 55.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,081 INFO L158 Benchmark]: TraceAbstraction took 9749.28ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 54.9MB in the beginning and 112.3MB in the end (delta: -57.4MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,081 INFO L158 Benchmark]: Witness Printer took 48.89ms. Allocated memory is still 197.1MB. Free memory was 112.3MB in the beginning and 109.2MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:48:21,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory is still 52.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.79ms. Allocated memory is still 96.5MB. Free memory was 62.6MB in the beginning and 71.7MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.92ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.42ms. Allocated memory is still 96.5MB. Free memory was 70.2MB in the beginning and 69.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 501.69ms. Allocated memory is still 96.5MB. Free memory was 69.0MB in the beginning and 55.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 9749.28ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 54.9MB in the beginning and 112.3MB in the end (delta: -57.4MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. * Witness Printer took 48.89ms. Allocated memory is still 197.1MB. Free memory was 112.3MB in the beginning and 109.2MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; [L76] int ldv_s_misc_fops_file_operations = 0; [L77] CALL my_init() [L71] open_called = 0 [L72] return 0; [L77] RET my_init() [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L84] CALL misc_open() [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; [L84] RET misc_open() [L85] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, ldv_s_misc_fops_file_operations++=53, misc_open()=55, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L92] CALL misc_read() [L54] return 0; [L92] RET misc_read() [L93] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, ldv_s_misc_fops_file_operations++=57, ldv_s_misc_fops_file_operations++=53, misc_open()=55, misc_read()=54, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L100] CALL misc_llseek() [L50] return 0; [L100] RET misc_llseek() [L101] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, ldv_s_misc_fops_file_operations++=57, ldv_s_misc_fops_file_operations++=52, ldv_s_misc_fops_file_operations++=53, misc_llseek()=49, misc_open()=55, misc_read()=54, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [__VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, ldv_s_misc_fops_file_operations++=57, ldv_s_misc_fops_file_operations++=52, ldv_s_misc_fops_file_operations++=53, misc_llseek()=49, misc_open()=55, misc_read()=54, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L108] CALL misc_release() [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L43] CALL mutex_lock() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 [L43] RET mutex_lock() VAL [ldv_mutex=2, open_called=0] [L44] CALL mutex_lock() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] CALL __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L6] reach_error() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 117 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 477 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 323 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 329 IncrementalHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 179 mSDtfsCounter, 329 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=5, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 122 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 715 SizeOfPredicates, 33 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 51/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 29, TOOLS_POST_TIME: 2.0s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 2.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 44, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 267, DAG_COMPRESSION_RETAINED_NODES: 46, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 23:48:21,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98964569-ab4f-444c-9470-2721a7bc0252/bin/utaipan-TEXQjIfE4P/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE