./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V --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 da786641c6f5791cd76909be3af2b92112e50156e91d6775689240586eed4e85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:33:31,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:33:31,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:33:31,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:33:31,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:33:31,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:33:31,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:33:31,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:33:31,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:33:31,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:33:31,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:33:31,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:33:31,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:33:31,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:33:31,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:33:31,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:33:31,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:33:31,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:33:31,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:33:31,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:33:31,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:33:31,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:33:31,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:33:31,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:33:31,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:33:31,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:33:31,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:33:31,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:33:31,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:33:31,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:33:31,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:33:31,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:33:31,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:33:31,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:33:31,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:33:31,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:33:31,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:33:31,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:33:31,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:33:31,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:33:31,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:33:31,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:33:31,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:33:31,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:33:31,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:33:31,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:33:31,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:33:31,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:33:31,498 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:33:31,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:33:31,498 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:33:31,499 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:33:31,500 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:33:31,500 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:33:31,501 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:33:31,501 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:33:31,501 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:33:31,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:33:31,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:33:31,502 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:33:31,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:33:31,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:33:31,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:33:31,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:33:31,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:33:31,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:33:31,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:33:31,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:33:31,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:33:31,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:33:31,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:33:31,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:33:31,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:33:31,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:33:31,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:31,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:33:31,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:33:31,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:33:31,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:33:31,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:33:31,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:33:31,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:33:31,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:33:31,513 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_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da786641c6f5791cd76909be3af2b92112e50156e91d6775689240586eed4e85 [2021-11-23 03:33:31,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:33:31,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:33:31,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:33:31,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:33:31,918 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:33:31,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2021-11-23 03:33:32,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/data/374050ac3/421c6c6ad6754da2bd6b8d911f96aab1/FLAG5943320b4 [2021-11-23 03:33:32,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:33:32,690 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2021-11-23 03:33:32,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/data/374050ac3/421c6c6ad6754da2bd6b8d911f96aab1/FLAG5943320b4 [2021-11-23 03:33:32,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/data/374050ac3/421c6c6ad6754da2bd6b8d911f96aab1 [2021-11-23 03:33:32,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:33:32,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:33:32,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:32,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:33:32,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:33:32,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:32" (1/1) ... [2021-11-23 03:33:32,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b9fe0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:32, skipping insertion in model container [2021-11-23 03:33:32,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:32" (1/1) ... [2021-11-23 03:33:32,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:33:33,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:33:33,376 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_f942ff70-dbab-46d4-a05d-6e4d92862f76/sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c[15806,15819] [2021-11-23 03:33:33,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:33,441 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:33:33,549 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_f942ff70-dbab-46d4-a05d-6e4d92862f76/sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c[15806,15819] [2021-11-23 03:33:33,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:33,590 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:33:33,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33 WrapperNode [2021-11-23 03:33:33,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:33,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:33,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:33:33,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:33:33,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,665 INFO L137 Inliner]: procedures = 55, calls = 154, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 256 [2021-11-23 03:33:33,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:33,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:33:33,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:33:33,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:33:33,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:33:33,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:33:33,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:33:33,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:33:33,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (1/1) ... [2021-11-23 03:33:33,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:33,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:33,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:33:33,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:33:33,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:33:33,847 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2021-11-23 03:33:33,847 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2021-11-23 03:33:33,847 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 03:33:33,848 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 03:33:33,848 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 03:33:33,848 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 03:33:33,848 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-23 03:33:33,849 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-23 03:33:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:33:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-23 03:33:33,849 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-23 03:33:33,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:33:33,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:33:33,968 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:33:33,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:33:34,520 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:33:34,663 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:33:34,663 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:33:34,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:34 BoogieIcfgContainer [2021-11-23 03:33:34,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:33:34,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:33:34,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:33:34,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:33:34,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:32" (1/3) ... [2021-11-23 03:33:34,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb6384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:34, skipping insertion in model container [2021-11-23 03:33:34,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:33" (2/3) ... [2021-11-23 03:33:34,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb6384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:34, skipping insertion in model container [2021-11-23 03:33:34,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:34" (3/3) ... [2021-11-23 03:33:34,684 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product44.cil.c [2021-11-23 03:33:34,695 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:33:34,695 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:33:34,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:33:34,784 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 [2021-11-23 03:33:34,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:33:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:33:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:33:34,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:34,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:34,839 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:34,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1264847305, now seen corresponding path program 1 times [2021-11-23 03:33:34,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:34,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488665934] [2021-11-23 03:33:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:34,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:35,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488665934] [2021-11-23 03:33:35,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488665934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:35,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:35,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:33:35,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179639591] [2021-11-23 03:33:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:35,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:33:35,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:33:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:33:35,266 INFO L87 Difference]: Start difference. First operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:33:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:35,394 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2021-11-23 03:33:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:33:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:33:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:35,410 INFO L225 Difference]: With dead ends: 86 [2021-11-23 03:33:35,410 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 03:33:35,416 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 [2021-11-23 03:33:35,421 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:35,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 03:33:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 03:33:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:33:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-23 03:33:35,474 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2021-11-23 03:33:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:35,474 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-23 03:33:35,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:33:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-23 03:33:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:33:35,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:35,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:35,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:33:35,478 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 803410131, now seen corresponding path program 1 times [2021-11-23 03:33:35,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379731458] [2021-11-23 03:33:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:35,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:35,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:35,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379731458] [2021-11-23 03:33:35,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379731458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:35,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:35,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:35,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377835703] [2021-11-23 03:33:35,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:35,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:33:35,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:33:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:35,622 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:33:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:35,700 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-11-23 03:33:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:33:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:33:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:35,703 INFO L225 Difference]: With dead ends: 55 [2021-11-23 03:33:35,703 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:33:35,704 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 [2021-11-23 03:33:35,706 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:35,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:33:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:33:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 03:33:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:33:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-23 03:33:35,716 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2021-11-23 03:33:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:35,717 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-23 03:33:35,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:33:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-23 03:33:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:33:35,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:35,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:35,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:33:35,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 35804266, now seen corresponding path program 1 times [2021-11-23 03:33:35,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:35,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115847784] [2021-11-23 03:33:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:35,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:35,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115847784] [2021-11-23 03:33:35,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115847784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:35,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:35,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:35,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991561880] [2021-11-23 03:33:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:35,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:33:35,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:33:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:33:35,827 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-23 03:33:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:35,918 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-11-23 03:33:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:33:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2021-11-23 03:33:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:35,921 INFO L225 Difference]: With dead ends: 88 [2021-11-23 03:33:35,921 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 03:33:35,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:33:35,924 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:35,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 90 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 03:33:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-11-23 03:33:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 44 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-23 03:33:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-23 03:33:35,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 15 [2021-11-23 03:33:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-23 03:33:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-23 03:33:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-23 03:33:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:33:35,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:35,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:35,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:33:35,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:35,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1637267262, now seen corresponding path program 1 times [2021-11-23 03:33:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651021678] [2021-11-23 03:33:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:35,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:36,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651021678] [2021-11-23 03:33:36,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651021678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:36,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:36,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:33:36,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6522834] [2021-11-23 03:33:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:36,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:33:36,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:33:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:33:36,087 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-23 03:33:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:36,251 INFO L93 Difference]: Finished difference Result 173 states and 213 transitions. [2021-11-23 03:33:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:33:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 18 [2021-11-23 03:33:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:36,254 INFO L225 Difference]: With dead ends: 173 [2021-11-23 03:33:36,255 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 03:33:36,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:33:36,258 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:36,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 114 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 03:33:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-11-23 03:33:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 77 states have internal predecessors, (87), 11 states have call successors, (11), 11 states have call predecessors, (11), 14 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-23 03:33:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-11-23 03:33:36,281 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 18 [2021-11-23 03:33:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:36,282 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-11-23 03:33:36,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-23 03:33:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-11-23 03:33:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:33:36,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:36,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:36,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:33:36,285 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -749439446, now seen corresponding path program 1 times [2021-11-23 03:33:36,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803495201] [2021-11-23 03:33:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:36,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:36,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803495201] [2021-11-23 03:33:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803495201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:36,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:36,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:33:36,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230946604] [2021-11-23 03:33:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:36,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:33:36,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:33:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:33:36,481 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:33:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:36,859 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2021-11-23 03:33:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:33:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-23 03:33:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:36,864 INFO L225 Difference]: With dead ends: 263 [2021-11-23 03:33:36,865 INFO L226 Difference]: Without dead ends: 199 [2021-11-23 03:33:36,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:33:36,870 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 105 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:36,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 184 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:33:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-23 03:33:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 155. [2021-11-23 03:33:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 126 states have internal predecessors, (143), 19 states have call successors, (19), 18 states have call predecessors, (19), 23 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2021-11-23 03:33:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2021-11-23 03:33:36,926 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 21 [2021-11-23 03:33:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:36,927 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2021-11-23 03:33:36,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:33:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2021-11-23 03:33:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:33:36,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:36,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:36,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:33:36,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -682106973, now seen corresponding path program 1 times [2021-11-23 03:33:36,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548556785] [2021-11-23 03:33:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:36,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:37,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:37,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548556785] [2021-11-23 03:33:37,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548556785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:37,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801301982] [2021-11-23 03:33:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:37,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:37,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:37,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:33:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 03:33:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:39,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801301982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964029322] [2021-11-23 03:33:39,163 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 03:33:39,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:33:39,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:33:39,178 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:33:39,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:33:43,371 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 46 for LOIs [2021-11-23 03:33:43,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:33:47,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1962#(and (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~6#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~6#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 03:33:47,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:33:47,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:33:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 20 [2021-11-23 03:33:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131066363] [2021-11-23 03:33:47,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:33:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:33:47,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:33:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 03:33:47,882 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:50,919 INFO L93 Difference]: Finished difference Result 673 states and 868 transitions. [2021-11-23 03:33:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-23 03:33:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-23 03:33:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:50,928 INFO L225 Difference]: With dead ends: 673 [2021-11-23 03:33:50,928 INFO L226 Difference]: Without dead ends: 581 [2021-11-23 03:33:50,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1203, Invalid=6279, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 03:33:50,936 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 492 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:50,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 682 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:33:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-23 03:33:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 425. [2021-11-23 03:33:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 311 states have (on average 1.292604501607717) internal successors, (402), 345 states have internal predecessors, (402), 51 states have call successors, (51), 50 states have call predecessors, (51), 62 states have return successors, (90), 53 states have call predecessors, (90), 51 states have call successors, (90) [2021-11-23 03:33:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 543 transitions. [2021-11-23 03:33:51,020 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 543 transitions. Word has length 31 [2021-11-23 03:33:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:51,020 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 543 transitions. [2021-11-23 03:33:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 543 transitions. [2021-11-23 03:33:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:33:51,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:51,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:51,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:51,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:51,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash 987907173, now seen corresponding path program 1 times [2021-11-23 03:33:51,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853158215] [2021-11-23 03:33:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:51,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:33:51,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:51,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853158215] [2021-11-23 03:33:51,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853158215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566064574] [2021-11-23 03:33:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:51,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:51,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:51,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:33:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:33:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:51,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:33:51,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566064574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915311940] [2021-11-23 03:33:51,921 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:33:51,921 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:33:51,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:33:51,922 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:33:51,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:33:58,258 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 40 for LOIs [2021-11-23 03:33:58,264 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2021-11-23 03:33:58,392 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:01,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4052#(and (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~6#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~6#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:01,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:01,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 16 [2021-11-23 03:34:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280003914] [2021-11-23 03:34:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:01,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:34:01,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:34:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 03:34:01,303 INFO L87 Difference]: Start difference. First operand 425 states and 543 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:34:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:03,276 INFO L93 Difference]: Finished difference Result 1418 states and 1819 transitions. [2021-11-23 03:34:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 03:34:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-11-23 03:34:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:03,295 INFO L225 Difference]: With dead ends: 1418 [2021-11-23 03:34:03,295 INFO L226 Difference]: Without dead ends: 1140 [2021-11-23 03:34:03,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1084, Invalid=7472, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 03:34:03,303 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 716 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:03,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:34:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-11-23 03:34:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 856. [2021-11-23 03:34:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 625 states have (on average 1.2528) internal successors, (783), 702 states have internal predecessors, (783), 100 states have call successors, (100), 93 states have call predecessors, (100), 130 states have return successors, (175), 103 states have call predecessors, (175), 100 states have call successors, (175) [2021-11-23 03:34:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1058 transitions. [2021-11-23 03:34:03,433 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1058 transitions. Word has length 34 [2021-11-23 03:34:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:03,434 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1058 transitions. [2021-11-23 03:34:03,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:34:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1058 transitions. [2021-11-23 03:34:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 03:34:03,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:03,442 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:03,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:03,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1767857605, now seen corresponding path program 1 times [2021-11-23 03:34:03,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:03,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119915166] [2021-11-23 03:34:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:03,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:03,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119915166] [2021-11-23 03:34:03,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119915166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680688597] [2021-11-23 03:34:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:03,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:03,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:03,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:34:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 03:34:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:05,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680688597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969583314] [2021-11-23 03:34:05,886 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:34:05,886 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:05,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:05,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:05,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:08,436 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 46 for LOIs [2021-11-23 03:34:08,711 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 41 for LOIs [2021-11-23 03:34:08,718 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:13,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8197#(and (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~6#1|) (<= 0 |#NULL.base|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~6#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4))' at error location [2021-11-23 03:34:13,075 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:13,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:13,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2021-11-23 03:34:13,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561393134] [2021-11-23 03:34:13,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 03:34:13,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 03:34:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 03:34:13,087 INFO L87 Difference]: Start difference. First operand 856 states and 1058 transitions. Second operand has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 5 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:34:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:16,208 INFO L93 Difference]: Finished difference Result 1833 states and 2316 transitions. [2021-11-23 03:34:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 03:34:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 5 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2021-11-23 03:34:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:16,220 INFO L225 Difference]: With dead ends: 1833 [2021-11-23 03:34:16,220 INFO L226 Difference]: Without dead ends: 1176 [2021-11-23 03:34:16,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1303, Invalid=6353, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 03:34:16,228 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 535 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:16,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 357 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:34:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-11-23 03:34:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 986. [2021-11-23 03:34:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 714 states have (on average 1.2366946778711485) internal successors, (883), 806 states have internal predecessors, (883), 118 states have call successors, (118), 112 states have call predecessors, (118), 153 states have return successors, (214), 117 states have call predecessors, (214), 118 states have call successors, (214) [2021-11-23 03:34:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1215 transitions. [2021-11-23 03:34:16,375 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1215 transitions. Word has length 49 [2021-11-23 03:34:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:16,376 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1215 transitions. [2021-11-23 03:34:16,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 5 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:34:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1215 transitions. [2021-11-23 03:34:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 03:34:16,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:16,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:16,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:16,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:34:16,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1332671014, now seen corresponding path program 1 times [2021-11-23 03:34:16,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852152862] [2021-11-23 03:34:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:34:16,669 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:34:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:34:16,765 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:34:16,766 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:34:16,767 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:34:16,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:34:16,786 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:16,790 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:34:16,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:34:16 BoogieIcfgContainer [2021-11-23 03:34:16,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:34:16,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:34:16,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:34:16,891 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:34:16,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:34" (3/4) ... [2021-11-23 03:34:16,894 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:34:17,017 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:34:17,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:34:17,019 INFO L158 Benchmark]: Toolchain (without parser) took 44098.49ms. Allocated memory was 94.4MB in the beginning and 406.8MB in the end (delta: 312.5MB). Free memory was 58.2MB in the beginning and 239.3MB in the end (delta: -181.1MB). Peak memory consumption was 132.4MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,019 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 94.4MB. Free memory was 64.9MB in the beginning and 64.9MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:34:17,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 668.18ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 58.0MB in the beginning and 98.6MB in the end (delta: -40.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.36ms. Allocated memory is still 132.1MB. Free memory was 97.9MB in the beginning and 95.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,021 INFO L158 Benchmark]: Boogie Preprocessor took 56.84ms. Allocated memory is still 132.1MB. Free memory was 95.8MB in the beginning and 94.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:34:17,021 INFO L158 Benchmark]: RCFGBuilder took 941.66ms. Allocated memory is still 132.1MB. Free memory was 94.4MB in the beginning and 72.0MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,022 INFO L158 Benchmark]: TraceAbstraction took 42221.32ms. Allocated memory was 132.1MB in the beginning and 406.8MB in the end (delta: 274.7MB). Free memory was 72.0MB in the beginning and 246.6MB in the end (delta: -174.6MB). Peak memory consumption was 101.6MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,023 INFO L158 Benchmark]: Witness Printer took 127.63ms. Allocated memory is still 406.8MB. Free memory was 246.6MB in the beginning and 239.3MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:34:17,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 94.4MB. Free memory was 64.9MB in the beginning and 64.9MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 668.18ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 58.0MB in the beginning and 98.6MB in the end (delta: -40.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.36ms. Allocated memory is still 132.1MB. Free memory was 97.9MB in the beginning and 95.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.84ms. Allocated memory is still 132.1MB. Free memory was 95.8MB in the beginning and 94.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 941.66ms. Allocated memory is still 132.1MB. Free memory was 94.4MB in the beginning and 72.0MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 42221.32ms. Allocated memory was 132.1MB in the beginning and 406.8MB in the end (delta: 274.7MB). Free memory was 72.0MB in the beginning and 246.6MB in the end (delta: -174.6MB). Peak memory consumption was 101.6MB. Max. memory is 16.1GB. * Witness Printer took 127.63ms. Allocated memory is still 406.8MB. Free memory was 246.6MB in the beginning and 239.3MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 762]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L248] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L565] int pumpRunning = 0; [L566] int systemActive = 1; [L767] int cleanupTimeShifts = 4; [L863] int waterLevel = 1; [L864] int methaneLevelCritical = 0; [L840] int retValue_acc ; [L841] int tmp ; [L845] FCALL select_helpers() [L846] FCALL select_features() [L847] CALL, EXPR valid_product() [L474] int retValue_acc ; [L477] retValue_acc = 1 [L478] return (retValue_acc); [L847] RET, EXPR valid_product() [L847] tmp = valid_product() [L849] COND TRUE \read(tmp) [L851] FCALL setup() [L852] CALL runTest() [L834] CALL test() [L490] int splverifierCounter ; [L491] int tmp ; [L492] int tmp___0 ; [L493] int tmp___1 ; [L494] int tmp___2 ; [L497] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L499] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L501] COND TRUE splverifierCounter < 4 [L507] tmp = __VERIFIER_nondet_int() [L509] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L511] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L881] COND TRUE waterLevel < 2 [L882] waterLevel = waterLevel + 1 [L511] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L517] tmp___0 = __VERIFIER_nondet_int() [L519] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L527] tmp___2 = __VERIFIER_nondet_int() [L529] COND FALSE !(\read(tmp___2)) [L535] tmp___1 = __VERIFIER_nondet_int() [L537] COND FALSE !(\read(tmp___1)) VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L546] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L572] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L579] COND TRUE \read(systemActive) [L581] CALL processEnvironment() [L601] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L604] COND TRUE ! pumpRunning [L606] CALL, EXPR isHighWaterLevel() [L716] int retValue_acc ; [L717] int tmp ; [L718] int tmp___0 ; [L722] CALL, EXPR isHighWaterSensorDry() [L943] int retValue_acc ; [L946] COND FALSE !(waterLevel < 2) [L950] retValue_acc = 0 [L951] return (retValue_acc); [L722] RET, EXPR isHighWaterSensorDry() [L722] tmp = isHighWaterSensorDry() [L724] COND FALSE !(\read(tmp)) [L727] tmp___0 = 1 [L729] retValue_acc = tmp___0 [L730] return (retValue_acc); [L606] RET, EXPR isHighWaterLevel() [L606] tmp = isHighWaterLevel() [L608] COND TRUE \read(tmp) [L610] CALL activatePump() [L635] int tmp ; [L639] CALL, EXPR isMethaneAlarm() [L660] int retValue_acc ; [L664] CALL, EXPR isMethaneLevelCritical() [L902] int retValue_acc ; [L905] retValue_acc = methaneLevelCritical [L906] return (retValue_acc); [L664] RET, EXPR isMethaneLevelCritical() [L664] retValue_acc = isMethaneLevelCritical() [L666] return (retValue_acc); [L639] RET, EXPR isMethaneAlarm() [L639] tmp = isMethaneAlarm() [L641] COND FALSE !(\read(tmp)) [L645] CALL activatePump__wrappee__highWaterSensor() [L629] pumpRunning = 1 [L645] RET activatePump__wrappee__highWaterSensor() [L610] RET activatePump() [L581] RET processEnvironment() [L587] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L934] int retValue_acc ; [L937] retValue_acc = waterLevel [L938] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L587] RET __utac_acc__Specification4_spec__1() [L546] RET timeShift() VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L499] COND TRUE 1 VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L501] COND TRUE splverifierCounter < 4 [L507] tmp = __VERIFIER_nondet_int() [L509] COND FALSE !(\read(tmp)) VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L517] tmp___0 = __VERIFIER_nondet_int() [L519] COND FALSE !(\read(tmp___0)) VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L527] tmp___2 = __VERIFIER_nondet_int() [L529] COND TRUE \read(tmp___2) [L531] CALL startSystem() [L753] systemActive = 1 [L531] RET startSystem() [L546] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L572] COND TRUE \read(pumpRunning) [L574] CALL lowerWaterLevel() [L869] COND TRUE waterLevel > 0 [L870] waterLevel = waterLevel - 1 [L574] RET lowerWaterLevel() [L579] COND TRUE \read(systemActive) [L581] CALL processEnvironment() [L601] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L604] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L619] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L581] RET processEnvironment() [L587] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L934] int retValue_acc ; [L937] retValue_acc = waterLevel [L938] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L587] RET __utac_acc__Specification4_spec__1() [L546] RET timeShift() VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L499] COND TRUE 1 VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L501] COND TRUE splverifierCounter < 4 [L507] tmp = __VERIFIER_nondet_int() [L509] COND FALSE !(\read(tmp)) VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L517] tmp___0 = __VERIFIER_nondet_int() [L519] COND FALSE !(\read(tmp___0)) VAL [__VERIFIER_nondet_int()=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L527] tmp___2 = __VERIFIER_nondet_int() [L529] COND TRUE \read(tmp___2) [L531] CALL startSystem() [L753] systemActive = 1 [L531] RET startSystem() [L546] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L572] COND TRUE \read(pumpRunning) [L574] CALL lowerWaterLevel() [L869] COND TRUE waterLevel > 0 [L870] waterLevel = waterLevel - 1 [L574] RET lowerWaterLevel() [L579] COND TRUE \read(systemActive) [L581] CALL processEnvironment() [L601] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L604] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L619] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L581] RET processEnvironment() [L587] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L934] int retValue_acc ; [L937] retValue_acc = waterLevel [L938] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND TRUE tmp == 0 [L63] CALL, EXPR isPumpRunning() [L671] int retValue_acc ; [L674] retValue_acc = pumpRunning [L675] return (retValue_acc); [L63] RET, EXPR isPumpRunning() [L63] tmp___0 = isPumpRunning() [L65] COND TRUE \read(tmp___0) [L67] CALL __automaton_fail() [L762] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 42.0s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1969 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1946 mSDsluCounter, 1838 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1864 mSDsCounter, 1075 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3310 IncrementalHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1075 mSolverCounterUnsat, 344 mSDtfsCounter, 3310 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 292 SyntacticMatches, 5 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8206 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=986occurred in iteration=8, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 8 MinimizatonAttempts, 704 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 364 NumberOfCodeBlocks, 364 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 407 ConstructedInterpolants, 0 QuantifiedInterpolants, 2513 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1137 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 113/177 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 03:34:17,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f942ff70-dbab-46d4-a05d-6e4d92862f76/bin/utaipan-EQgc7hIp5V/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