./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS --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 a5df7e7a530538a677becf014bfb990c6b0570c5e1058d85d7e78cec25f53253 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:55:14,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:55:14,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:55:14,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:55:14,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:55:14,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:55:14,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:55:14,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:55:14,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:55:14,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:55:14,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:55:14,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:55:14,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:55:14,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:55:14,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:55:14,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:55:14,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:55:14,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:55:14,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:55:14,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:55:14,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:55:14,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:55:14,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:55:14,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:55:14,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:55:14,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:55:14,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:55:14,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:55:14,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:55:14,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:55:14,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:55:14,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:55:14,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:55:14,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:55:14,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:55:14,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:55:14,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:55:14,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:55:14,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:55:14,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:55:14,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:55:14,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:55:15,043 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:55:15,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:55:15,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:55:15,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:55:15,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:55:15,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:55:15,046 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:55:15,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:55:15,047 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:55:15,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:55:15,048 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:55:15,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:55:15,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:55:15,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:55:15,049 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:55:15,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:55:15,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:55:15,050 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:55:15,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:55:15,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:55:15,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:55:15,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:55:15,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:55:15,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:55:15,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:55:15,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:55:15,052 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:55:15,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:55:15,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:55:15,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:55:15,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:55:15,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:55:15,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:55:15,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:55:15,054 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:55:15,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:55:15,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:55:15,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:55:15,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:55:15,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:55:15,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:55:15,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5df7e7a530538a677becf014bfb990c6b0570c5e1058d85d7e78cec25f53253 [2022-11-19 07:55:15,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:55:15,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:55:15,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:55:15,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:55:15,412 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:55:15,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c [2022-11-19 07:55:15,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/data/e3b2ed315/3301362166604966872487f651c852a2/FLAGa3273d9cc [2022-11-19 07:55:16,109 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:55:16,123 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c [2022-11-19 07:55:16,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/data/e3b2ed315/3301362166604966872487f651c852a2/FLAGa3273d9cc [2022-11-19 07:55:16,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/data/e3b2ed315/3301362166604966872487f651c852a2 [2022-11-19 07:55:16,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:55:16,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:55:16,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:55:16,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:55:16,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:55:16,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:16,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a65ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16, skipping insertion in model container [2022-11-19 07:55:16,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:16,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:55:16,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:55:16,868 WARN L234 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_d47d0a16-1ff5-47ad-abde-09695fb1d60c/sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c[19170,19183] [2022-11-19 07:55:16,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:55:16,882 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:55:16,960 WARN L234 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_d47d0a16-1ff5-47ad-abde-09695fb1d60c/sv-benchmarks/c/product-lines/minepump_spec2_product58.cil.c[19170,19183] [2022-11-19 07:55:16,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:55:16,995 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:55:16,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16 WrapperNode [2022-11-19 07:55:16,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:55:16,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:55:16,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:55:16,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:55:17,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,080 INFO L138 Inliner]: procedures = 58, calls = 102, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 223 [2022-11-19 07:55:17,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:55:17,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:55:17,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:55:17,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:55:17,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:55:17,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:55:17,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:55:17,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:55:17,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (1/1) ... [2022-11-19 07:55:17,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:55:17,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:17,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:55:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-19 07:55:17,240 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-19 07:55:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:55:17,240 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:55:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:55:17,240 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:55:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2022-11-19 07:55:17,241 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2022-11-19 07:55:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-11-19 07:55:17,241 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-11-19 07:55:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 07:55:17,242 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 07:55:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:55:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 07:55:17,242 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 07:55:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:55:17,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:55:17,361 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:55:17,364 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:55:17,782 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:55:17,883 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:55:17,884 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:55:17,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:17 BoogieIcfgContainer [2022-11-19 07:55:17,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:55:17,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:55:17,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:55:17,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:55:17,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:16" (1/3) ... [2022-11-19 07:55:17,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2111104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:17, skipping insertion in model container [2022-11-19 07:55:17,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:16" (2/3) ... [2022-11-19 07:55:17,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2111104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:17, skipping insertion in model container [2022-11-19 07:55:17,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:17" (3/3) ... [2022-11-19 07:55:17,897 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product58.cil.c [2022-11-19 07:55:17,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:55:17,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:55:17,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:55:17,998 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@748d4693, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:55:17,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:55:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:55:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:55:18,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:18,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:18,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1994170977, now seen corresponding path program 1 times [2022-11-19 07:55:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801727355] [2022-11-19 07:55:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:18,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801727355] [2022-11-19 07:55:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801727355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:18,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:18,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793494989] [2022-11-19 07:55:18,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:55:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:55:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:55:18,335 INFO L87 Difference]: Start difference. First operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:55:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:18,454 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2022-11-19 07:55:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:55:18,457 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-19 07:55:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:18,478 INFO L225 Difference]: With dead ends: 114 [2022-11-19 07:55:18,478 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 07:55:18,483 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:55:18,488 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:18,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 07:55:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-19 07:55:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:55:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-19 07:55:18,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 17 [2022-11-19 07:55:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:18,555 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-19 07:55:18,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:55:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-19 07:55:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:55:18,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:18,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:55:18,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash 295418545, now seen corresponding path program 1 times [2022-11-19 07:55:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467922952] [2022-11-19 07:55:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:18,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:18,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467922952] [2022-11-19 07:55:18,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467922952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:18,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:18,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:55:18,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737314164] [2022-11-19 07:55:18,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:18,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:18,761 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:55:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:18,853 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2022-11-19 07:55:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-19 07:55:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:18,854 INFO L225 Difference]: With dead ends: 83 [2022-11-19 07:55:18,855 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 07:55:18,855 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:55:18,857 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:18,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 07:55:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-19 07:55:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:55:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-19 07:55:18,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 18 [2022-11-19 07:55:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:18,865 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-19 07:55:18,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:55:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-19 07:55:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:55:18,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:18,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:55:18,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1927685859, now seen corresponding path program 1 times [2022-11-19 07:55:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602596472] [2022-11-19 07:55:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:19,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602596472] [2022-11-19 07:55:19,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602596472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:19,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:19,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:55:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285011499] [2022-11-19 07:55:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:19,034 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-19 07:55:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,117 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2022-11-19 07:55:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:55:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 20 [2022-11-19 07:55:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,120 INFO L225 Difference]: With dead ends: 88 [2022-11-19 07:55:19,120 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 07:55:19,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:19,122 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 07:55:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-19 07:55:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:55:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-19 07:55:19,132 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2022-11-19 07:55:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:19,133 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-19 07:55:19,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-19 07:55:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-19 07:55:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:55:19,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:19,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:55:19,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash 892214911, now seen corresponding path program 1 times [2022-11-19 07:55:19,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879298356] [2022-11-19 07:55:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:19,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:19,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879298356] [2022-11-19 07:55:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879298356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:19,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:19,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:55:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124696080] [2022-11-19 07:55:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,217 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-19 07:55:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,279 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2022-11-19 07:55:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-11-19 07:55:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,281 INFO L225 Difference]: With dead ends: 123 [2022-11-19 07:55:19,281 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 07:55:19,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,283 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:55:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 07:55:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-11-19 07:55:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 59 states have internal predecessors, (66), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-19 07:55:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2022-11-19 07:55:19,300 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 23 [2022-11-19 07:55:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:19,301 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2022-11-19 07:55:19,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-19 07:55:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2022-11-19 07:55:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:55:19,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:19,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:55:19,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash -758315688, now seen corresponding path program 1 times [2022-11-19 07:55:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354914450] [2022-11-19 07:55:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:19,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354914450] [2022-11-19 07:55:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354914450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:19,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:55:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239574481] [2022-11-19 07:55:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:19,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:55:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:55:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:55:19,458 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:55:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,630 INFO L93 Difference]: Finished difference Result 226 states and 285 transitions. [2022-11-19 07:55:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:55:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-19 07:55:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,642 INFO L225 Difference]: With dead ends: 226 [2022-11-19 07:55:19,644 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:55:19,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:55:19,647 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 33 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 214 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:55:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2022-11-19 07:55:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.231578947368421) internal successors, (117), 106 states have internal predecessors, (117), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-19 07:55:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2022-11-19 07:55:19,678 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 31 [2022-11-19 07:55:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:19,679 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2022-11-19 07:55:19,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:55:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2022-11-19 07:55:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:55:19,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:19,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:55:19,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash -197557558, now seen corresponding path program 1 times [2022-11-19 07:55:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:19,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697779644] [2022-11-19 07:55:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:19,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:19,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:19,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697779644] [2022-11-19 07:55:19,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697779644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:19,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:19,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:55:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078174873] [2022-11-19 07:55:19,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:19,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:19,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:19,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,796 INFO L87 Difference]: Start difference. First operand 142 states and 173 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:55:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,882 INFO L93 Difference]: Finished difference Result 218 states and 275 transitions. [2022-11-19 07:55:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-19 07:55:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,893 INFO L225 Difference]: With dead ends: 218 [2022-11-19 07:55:19,893 INFO L226 Difference]: Without dead ends: 216 [2022-11-19 07:55:19,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,899 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 89 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-19 07:55:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-11-19 07:55:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 161 states have internal predecessors, (178), 37 states have call successors, (37), 34 states have call predecessors, (37), 34 states have return successors, (57), 37 states have call predecessors, (57), 37 states have call successors, (57) [2022-11-19 07:55:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2022-11-19 07:55:19,936 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 34 [2022-11-19 07:55:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:19,936 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2022-11-19 07:55:19,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:55:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2022-11-19 07:55:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:55:19,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:19,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:55:19,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1121406910, now seen corresponding path program 1 times [2022-11-19 07:55:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:19,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142161998] [2022-11-19 07:55:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:55:20,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142161998] [2022-11-19 07:55:20,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142161998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207119906] [2022-11-19 07:55:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:20,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:20,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:20,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:55:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:55:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:55:21,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207119906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:21,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336843458] [2022-11-19 07:55:21,679 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-19 07:55:21,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:55:21,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:55:21,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:55:21,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:55:24,357 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2022-11-19 07:55:24,598 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 27 for LOIs [2022-11-19 07:55:24,767 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 42 for LOIs [2022-11-19 07:55:24,773 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 47 for LOIs [2022-11-19 07:55:24,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:55:29,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2704#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~8#1|) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (= ~head~0.offset 0) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~8#1|) (<= 0 ~methAndRunningLastTime~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (<= 0 |old(~methAndRunningLastTime~0)|) (<= |old(~methAndRunningLastTime~0)| 1) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 2147483647) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 0)) (not (= ~methAndRunningLastTime~0 0)) (<= ~methAndRunningLastTime~0 1) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 07:55:29,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:55:29,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:55:29,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2022-11-19 07:55:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703663583] [2022-11-19 07:55:29,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:55:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:55:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:55:29,863 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand has 24 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 9 states have call successors, (15), 6 states have call predecessors, (15), 13 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 07:55:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:34,003 INFO L93 Difference]: Finished difference Result 1190 states and 1713 transitions. [2022-11-19 07:55:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 07:55:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 9 states have call successors, (15), 6 states have call predecessors, (15), 13 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) Word has length 57 [2022-11-19 07:55:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:34,010 INFO L225 Difference]: With dead ends: 1190 [2022-11-19 07:55:34,010 INFO L226 Difference]: Without dead ends: 933 [2022-11-19 07:55:34,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1214, Invalid=9706, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 07:55:34,018 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 857 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:34,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 353 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 07:55:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-11-19 07:55:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 633. [2022-11-19 07:55:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 425 states have (on average 1.1976470588235295) internal successors, (509), 463 states have internal predecessors, (509), 103 states have call successors, (103), 83 states have call predecessors, (103), 104 states have return successors, (160), 109 states have call predecessors, (160), 103 states have call successors, (160) [2022-11-19 07:55:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 772 transitions. [2022-11-19 07:55:34,161 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 772 transitions. Word has length 57 [2022-11-19 07:55:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:34,162 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 772 transitions. [2022-11-19 07:55:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 9 states have call successors, (15), 6 states have call predecessors, (15), 13 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 07:55:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 772 transitions. [2022-11-19 07:55:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:55:34,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:34,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:34,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:55:34,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:34,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2010976781, now seen corresponding path program 1 times [2022-11-19 07:55:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335561538] [2022-11-19 07:55:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:55:34,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335561538] [2022-11-19 07:55:34,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335561538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056046891] [2022-11-19 07:55:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:34,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:34,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:55:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:55:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:55:34,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:34,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056046891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:34,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:55:34,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 07:55:34,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75350106] [2022-11-19 07:55:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:55:34,703 INFO L87 Difference]: Start difference. First operand 633 states and 772 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:55:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:34,813 INFO L93 Difference]: Finished difference Result 1172 states and 1463 transitions. [2022-11-19 07:55:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:55:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 64 [2022-11-19 07:55:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:34,818 INFO L225 Difference]: With dead ends: 1172 [2022-11-19 07:55:34,818 INFO L226 Difference]: Without dead ends: 656 [2022-11-19 07:55:34,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:55:34,823 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 32 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:34,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:55:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-19 07:55:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 591. [2022-11-19 07:55:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 396 states have (on average 1.1691919191919191) internal successors, (463), 427 states have internal predecessors, (463), 98 states have call successors, (98), 78 states have call predecessors, (98), 96 states have return successors, (143), 103 states have call predecessors, (143), 98 states have call successors, (143) [2022-11-19 07:55:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 704 transitions. [2022-11-19 07:55:34,918 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 704 transitions. Word has length 64 [2022-11-19 07:55:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:34,920 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 704 transitions. [2022-11-19 07:55:34,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:55:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 704 transitions. [2022-11-19 07:55:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:55:34,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:34,926 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:34,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:35,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash -507746239, now seen corresponding path program 1 times [2022-11-19 07:55:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435664437] [2022-11-19 07:55:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:55:35,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435664437] [2022-11-19 07:55:35,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435664437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807779592] [2022-11-19 07:55:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:35,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:35,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:35,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:55:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:55:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:55:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:55:36,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807779592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:36,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100819091] [2022-11-19 07:55:36,282 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-19 07:55:36,282 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:55:36,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:55:36,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:55:36,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:55:38,538 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2022-11-19 07:55:38,865 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 29 for LOIs [2022-11-19 07:55:39,009 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 45 for LOIs [2022-11-19 07:55:39,015 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 49 for LOIs [2022-11-19 07:55:39,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:55:44,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8976#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~8#1|) (= ~head~0.offset 0) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~8#1|) (<= 2 |old(~waterLevel~0)|) (<= 0 |old(~methAndRunningLastTime~0)|) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 2147483647) (<= 0 ~methaneLevelCritical~0) (= |old(~waterLevel~0)| ~waterLevel~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |old(~methAndRunningLastTime~0)| ~methAndRunningLastTime~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 0)) (not (= ~methAndRunningLastTime~0 0)) (<= ~methAndRunningLastTime~0 1) (<= 0 |#StackHeapBarrier|) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 07:55:44,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:55:44,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:55:44,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 24 [2022-11-19 07:55:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624243582] [2022-11-19 07:55:44,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:44,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:55:44,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:44,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:55:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:55:44,771 INFO L87 Difference]: Start difference. First operand 591 states and 704 transitions. Second operand has 24 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 10 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-19 07:55:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:51,511 INFO L93 Difference]: Finished difference Result 1853 states and 2297 transitions. [2022-11-19 07:55:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-19 07:55:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 10 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) Word has length 66 [2022-11-19 07:55:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:51,518 INFO L225 Difference]: With dead ends: 1853 [2022-11-19 07:55:51,518 INFO L226 Difference]: Without dead ends: 1284 [2022-11-19 07:55:51,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11537 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2745, Invalid=27357, Unknown=0, NotChecked=0, Total=30102 [2022-11-19 07:55:51,528 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1005 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 3060 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 3060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:51,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 811 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 3060 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:55:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-11-19 07:55:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 942. [2022-11-19 07:55:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 625 states have (on average 1.1488) internal successors, (718), 676 states have internal predecessors, (718), 156 states have call successors, (156), 135 states have call predecessors, (156), 160 states have return successors, (234), 159 states have call predecessors, (234), 156 states have call successors, (234) [2022-11-19 07:55:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1108 transitions. [2022-11-19 07:55:51,693 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1108 transitions. Word has length 66 [2022-11-19 07:55:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:51,693 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 1108 transitions. [2022-11-19 07:55:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 10 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-19 07:55:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1108 transitions. [2022-11-19 07:55:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:55:51,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:51,710 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-19 07:55:51,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:51,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:51,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1345019468, now seen corresponding path program 1 times [2022-11-19 07:55:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:51,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244399694] [2022-11-19 07:55:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:55:52,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244399694] [2022-11-19 07:55:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244399694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496127185] [2022-11-19 07:55:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:52,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:52,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:52,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:55:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:55:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 59 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:55:53,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:55:53,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496127185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814235518] [2022-11-19 07:55:53,779 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:55:53,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:55:53,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:55:53,780 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:55:53,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:55:56,769 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 42 for LOIs [2022-11-19 07:55:56,776 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 30 for LOIs [2022-11-19 07:55:56,989 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-19 07:55:57,344 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 49 for LOIs [2022-11-19 07:55:57,354 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 24 for LOIs [2022-11-19 07:55:57,357 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 35 for LOIs [2022-11-19 07:55:57,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:01,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14229#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~8#1|) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~8#1|) (<= 0 ~methAndRunningLastTime~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (<= 0 |old(~methAndRunningLastTime~0)|) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 2147483647) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 0)) (<= 0 |#NULL.offset|) (not (= ~methAndRunningLastTime~0 0)) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:01,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:01,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:56:01,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-11-19 07:56:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402442895] [2022-11-19 07:56:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 07:56:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 07:56:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3238, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 07:56:01,919 INFO L87 Difference]: Start difference. First operand 942 states and 1108 transitions. Second operand has 30 states, 27 states have (on average 4.296296296296297) internal successors, (116), 26 states have internal predecessors, (116), 14 states have call successors, (30), 10 states have call predecessors, (30), 12 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-19 07:56:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:04,855 INFO L93 Difference]: Finished difference Result 3528 states and 4424 transitions. [2022-11-19 07:56:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 07:56:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.296296296296297) internal successors, (116), 26 states have internal predecessors, (116), 14 states have call successors, (30), 10 states have call predecessors, (30), 12 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) Word has length 96 [2022-11-19 07:56:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:04,871 INFO L225 Difference]: With dead ends: 3528 [2022-11-19 07:56:04,871 INFO L226 Difference]: Without dead ends: 2745 [2022-11-19 07:56:04,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 243 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1047, Invalid=7509, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 07:56:04,878 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1030 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:04,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 710 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:56:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-19 07:56:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2392. [2022-11-19 07:56:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 1612 states have (on average 1.1352357320099256) internal successors, (1830), 1721 states have internal predecessors, (1830), 395 states have call successors, (395), 303 states have call predecessors, (395), 384 states have return successors, (627), 409 states have call predecessors, (627), 395 states have call successors, (627) [2022-11-19 07:56:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 2852 transitions. [2022-11-19 07:56:05,227 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 2852 transitions. Word has length 96 [2022-11-19 07:56:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:05,228 INFO L495 AbstractCegarLoop]: Abstraction has 2392 states and 2852 transitions. [2022-11-19 07:56:05,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.296296296296297) internal successors, (116), 26 states have internal predecessors, (116), 14 states have call successors, (30), 10 states have call predecessors, (30), 12 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-19 07:56:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 2852 transitions. [2022-11-19 07:56:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:56:05,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:05,243 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:05,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:56:05,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:56:05,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -550431023, now seen corresponding path program 1 times [2022-11-19 07:56:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:05,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464280626] [2022-11-19 07:56:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 85 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 07:56:06,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464280626] [2022-11-19 07:56:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464280626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708667950] [2022-11-19 07:56:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:06,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:06,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:56:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:56:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 151 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:56:07,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 105 proven. 58 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:56:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708667950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940833787] [2022-11-19 07:56:08,344 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:56:08,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:56:08,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:56:08,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:56:08,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:56:12,469 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 136 for LOIs [2022-11-19 07:56:12,484 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 54 for LOIs [2022-11-19 07:56:12,873 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 41 for LOIs [2022-11-19 07:56:13,075 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 51 for LOIs [2022-11-19 07:56:13,085 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 45 for LOIs [2022-11-19 07:56:13,091 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 27 for LOIs [2022-11-19 07:56:13,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:21,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24429#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (<= ~methaneLevelCritical~0 1) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~8#1|) (= ~head~0.offset 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~8#1|) (<= 0 ~methAndRunningLastTime~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (<= 0 |old(~methAndRunningLastTime~0)|) (<= |old(~methAndRunningLastTime~0)| 1) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0) (<= 0 ~methaneLevelCritical~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| 0)) (not (= ~methAndRunningLastTime~0 0)) (<= ~methAndRunningLastTime~0 1) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:21,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:21,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:56:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 36 [2022-11-19 07:56:21,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394716070] [2022-11-19 07:56:21,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:56:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:56:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=3950, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:56:21,882 INFO L87 Difference]: Start difference. First operand 2392 states and 2852 transitions. Second operand has 36 states, 34 states have (on average 5.117647058823529) internal successors, (174), 35 states have internal predecessors, (174), 22 states have call successors, (40), 8 states have call predecessors, (40), 14 states have return successors, (42), 18 states have call predecessors, (42), 22 states have call successors, (42) [2022-11-19 07:56:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:23,115 INFO L93 Difference]: Finished difference Result 2827 states and 3364 transitions. [2022-11-19 07:56:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:56:23,116 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 5.117647058823529) internal successors, (174), 35 states have internal predecessors, (174), 22 states have call successors, (40), 8 states have call predecessors, (40), 14 states have return successors, (42), 18 states have call predecessors, (42), 22 states have call successors, (42) Word has length 145 [2022-11-19 07:56:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:23,117 INFO L225 Difference]: With dead ends: 2827 [2022-11-19 07:56:23,117 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:56:23,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 365 SyntacticMatches, 31 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4294 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=789, Invalid=5691, Unknown=0, NotChecked=0, Total=6480 [2022-11-19 07:56:23,125 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 532 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:23,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 300 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:56:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:56:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:56:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:56:23,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 145 [2022-11-19 07:56:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:23,127 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:56:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 5.117647058823529) internal successors, (174), 35 states have internal predecessors, (174), 22 states have call successors, (40), 8 states have call predecessors, (40), 14 states have return successors, (42), 18 states have call predecessors, (42), 22 states have call successors, (42) [2022-11-19 07:56:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:56:23,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:56:23,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:56:23,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:56:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:56:23,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 07:56:30,253 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__baseEXIT(lines 629 635) no Hoare annotation was computed. [2022-11-19 07:56:30,254 INFO L902 garLoopResultBuilder]: At program point processEnvironment__wrappee__baseFINAL(lines 629 635) the Hoare annotation is: true [2022-11-19 07:56:30,254 INFO L895 garLoopResultBuilder]: At program point changeMethaneLevelENTRY(lines 84 95) the Hoare annotation is: (let ((.cse1 (not (= ~pumpRunning~0 0))) (.cse0 (= |old(~methaneLevelCritical~0)| ~methaneLevelCritical~0)) (.cse2 (= 0 ~systemActive~0)) (.cse3 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 (and (not (= |old(~methaneLevelCritical~0)| 0)) .cse1) (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse2 .cse3) (or .cse1 (not (<= 1 ~waterLevel~0)) .cse0 (not (<= ~waterLevel~0 1)) .cse2 .cse3))) [2022-11-19 07:56:30,254 INFO L899 garLoopResultBuilder]: For program point changeMethaneLevelEXIT(lines 84 95) no Hoare annotation was computed. [2022-11-19 07:56:30,254 INFO L902 garLoopResultBuilder]: At program point L929(lines 904 933) the Hoare annotation is: true [2022-11-19 07:56:30,254 INFO L899 garLoopResultBuilder]: For program point cleanupEXIT(lines 904 933) no Hoare annotation was computed. [2022-11-19 07:56:30,255 INFO L899 garLoopResultBuilder]: For program point L925(line 925) no Hoare annotation was computed. [2022-11-19 07:56:30,255 INFO L902 garLoopResultBuilder]: At program point cleanupENTRY(lines 904 933) the Hoare annotation is: true [2022-11-19 07:56:30,255 INFO L899 garLoopResultBuilder]: For program point L918(lines 918 922) no Hoare annotation was computed. [2022-11-19 07:56:30,255 INFO L902 garLoopResultBuilder]: At program point L918-1(lines 918 922) the Hoare annotation is: true [2022-11-19 07:56:30,255 INFO L902 garLoopResultBuilder]: At program point L914-2(lines 914 928) the Hoare annotation is: true [2022-11-19 07:56:30,255 INFO L902 garLoopResultBuilder]: At program point L910(line 910) the Hoare annotation is: true [2022-11-19 07:56:30,255 INFO L899 garLoopResultBuilder]: For program point L910-1(line 910) no Hoare annotation was computed. [2022-11-19 07:56:30,256 INFO L899 garLoopResultBuilder]: For program point L609-1(lines 608 627) no Hoare annotation was computed. [2022-11-19 07:56:30,256 INFO L895 garLoopResultBuilder]: At program point L671(lines 671 679) the Hoare annotation is: (let ((.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse1 (= 0 ~systemActive~0))) (and (or .cse0 .cse1 (not (<= |old(~waterLevel~0)| 2)) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (= |timeShift_processEnvironment_~tmp~5#1| 1) (= ~methAndRunningLastTime~0 0) (not (= ~pumpRunning~0 0)) (= |old(~waterLevel~0)| (+ ~waterLevel~0 1))) (not (<= 2 |old(~waterLevel~0)|))) (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (not (<= 1 |old(~waterLevel~0)|)) .cse1))) [2022-11-19 07:56:30,256 INFO L895 garLoopResultBuilder]: At program point L667(lines 667 684) the Hoare annotation is: (let ((.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse2 (= ~methAndRunningLastTime~0 0)) (.cse3 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse1 (= ~pumpRunning~0 0)) (.cse4 (= 0 ~systemActive~0))) (and (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (and .cse1 .cse2 .cse3) (not (<= 1 |old(~waterLevel~0)|)) .cse4) (or .cse0 (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse2 (or (and .cse1 .cse3) (and (not .cse1) (= |old(~waterLevel~0)| (+ ~waterLevel~0 1))))) .cse4 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2022-11-19 07:56:30,257 INFO L895 garLoopResultBuilder]: At program point L841(line 841) the Hoare annotation is: (let ((.cse1 (not (= |old(~pumpRunning~0)| 0))) (.cse3 (= ~methAndRunningLastTime~0 0)) (.cse4 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse2 (= ~pumpRunning~0 0)) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse6 (= 0 ~systemActive~0))) (and (or .cse0 (and (= |timeShift_processEnvironment_~tmp~5#1| 1) .cse1 .cse2 .cse3 (= |old(~waterLevel~0)| (+ ~waterLevel~0 1))) (and .cse3 .cse4 (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= ~methaneLevelCritical~0 1))) (let ((.cse5 (= ~methaneLevelCritical~0 0))) (or (and .cse2 (not .cse5)) (and .cse5 (= ~pumpRunning~0 1))))) .cse6 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or (not (<= |old(~waterLevel~0)| 1)) .cse1 .cse0 (and .cse2 .cse3 .cse4) (not (<= 1 |old(~waterLevel~0)|)) .cse6) (or .cse2 .cse0 (not (= |old(~pumpRunning~0)| 1)) (not (= |old(~waterLevel~0)| 2)) .cse6))) [2022-11-19 07:56:30,257 INFO L899 garLoopResultBuilder]: For program point L841-1(line 841) no Hoare annotation was computed. [2022-11-19 07:56:30,257 INFO L895 garLoopResultBuilder]: At program point L677(line 677) the Hoare annotation is: (let ((.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse1 (= 0 ~systemActive~0))) (and (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (not (<= 1 |old(~waterLevel~0)|)) .cse1) (or .cse0 .cse1 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2022-11-19 07:56:30,258 INFO L899 garLoopResultBuilder]: For program point L847(lines 847 857) no Hoare annotation was computed. [2022-11-19 07:56:30,258 INFO L895 garLoopResultBuilder]: At program point L1004(line 1004) the Hoare annotation is: (let ((.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse1 (= 0 ~systemActive~0))) (and (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (not (<= 1 |old(~waterLevel~0)|)) .cse1) (or .cse0 .cse1 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2022-11-19 07:56:30,258 INFO L895 garLoopResultBuilder]: At program point L843(lines 843 860) the Hoare annotation is: (let ((.cse8 (= ~methaneLevelCritical~0 0))) (let ((.cse1 (= ~pumpRunning~0 0)) (.cse7 (not .cse8))) (let ((.cse2 (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0)) (.cse3 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse4 (or (and .cse1 .cse7) (and .cse8 (= ~pumpRunning~0 1)))) (.cse6 (not (<= |old(~waterLevel~0)| 2))) (.cse11 (not (<= |old(~waterLevel~0)| 1))) (.cse9 (not (= |old(~pumpRunning~0)| 0))) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse10 (= ~methAndRunningLastTime~0 0)) (.cse12 (not (<= 1 |old(~waterLevel~0)|))) (.cse5 (= 0 ~systemActive~0))) (and (or .cse0 (and (= |timeShift_processEnvironment_~tmp~5#1| 1) .cse1 (= |old(~waterLevel~0)| (+ ~waterLevel~0 1)) .cse2) (and .cse2 .cse3 (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= ~methaneLevelCritical~0 1))) .cse4) .cse5 .cse6 (not (<= 2 |old(~waterLevel~0)|))) (or (and .cse7 .cse3) .cse0 (and .cse8 (not (= |old(~pumpRunning~0)| 1))) (and .cse9 .cse1 .cse10) (not (= |old(~waterLevel~0)| 2)) (and .cse9 .cse7) .cse5) (or .cse11 .cse9 .cse0 .cse12 (and .cse1 .cse2 .cse3) .cse5) (or (and .cse10 .cse4) .cse9 .cse0 (< |old(~waterLevel~0)| 2) .cse5 .cse6) (or .cse11 .cse9 .cse0 .cse10 .cse12 .cse7 .cse5))))) [2022-11-19 07:56:30,259 INFO L895 garLoopResultBuilder]: At program point L682(line 682) the Hoare annotation is: (let ((.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse1 (= ~pumpRunning~0 0)) (.cse2 (= ~methAndRunningLastTime~0 0)) (.cse3 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse4 (= 0 ~systemActive~0))) (and (or .cse0 (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse1 .cse2 .cse3) .cse4 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (and .cse1 .cse2 .cse3) (not (<= 1 |old(~waterLevel~0)|)) .cse4))) [2022-11-19 07:56:30,259 INFO L895 garLoopResultBuilder]: At program point L843-1(lines 835 863) the Hoare annotation is: (let ((.cse17 (not (<= |old(~waterLevel~0)| 1))) (.cse18 (not (<= 1 |old(~waterLevel~0)|))) (.cse4 (= ~methAndRunningLastTime~0 0)) (.cse7 (= |timeShift___utac_acc__Specification2_spec__2_~tmp~9#1| ~methaneLevelCritical~0)) (.cse9 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse2 (not (= |old(~pumpRunning~0)| 0))) (.cse12 (= ~methaneLevelCritical~0 0)) (.cse6 (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (.cse16 (not (<= |old(~waterLevel~0)| 2))) (.cse3 (= ~pumpRunning~0 0)) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse15 (= 0 ~systemActive~0))) (and (let ((.cse1 (= |timeShift_processEnvironment_~tmp~5#1| 1)) (.cse5 (= |old(~waterLevel~0)| (+ ~waterLevel~0 1))) (.cse13 (or .cse12 (not (= |isMethaneLevelCritical_#res| 0)))) (.cse8 (not .cse15)) (.cse14 (or (not (= |processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#t~ret39#1| 0)) .cse12)) (.cse11 (not .cse12)) (.cse10 (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= ~methaneLevelCritical~0 1))))) (or .cse0 (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse4 .cse7 .cse9 .cse10 (or (and .cse3 .cse11) (and .cse12 (= ~pumpRunning~0 1))) .cse13 .cse14) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse7 .cse13 .cse8 .cse14) (and .cse3 .cse4 .cse11 .cse6 .cse7 .cse9 .cse10) .cse15 .cse16 (not (<= 2 |old(~waterLevel~0)|)))) (or .cse17 .cse2 .cse0 .cse12 .cse18 .cse6 .cse15) (or .cse17 .cse2 .cse0 .cse18 (and .cse3 .cse4 .cse7 .cse9) .cse15) (or .cse2 .cse0 .cse12 (< |old(~waterLevel~0)| 2) .cse6 .cse15 .cse16) (or .cse3 .cse0 (not (= |old(~pumpRunning~0)| 1)) (not (= |old(~waterLevel~0)| 2)) .cse15))) [2022-11-19 07:56:30,260 INFO L895 garLoopResultBuilder]: At program point L682-1(lines 663 687) the Hoare annotation is: (let ((.cse1 (not (= |old(~pumpRunning~0)| 0))) (.cse3 (= ~methAndRunningLastTime~0 0)) (.cse4 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse2 (= ~pumpRunning~0 0)) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse6 (= 0 ~systemActive~0))) (and (or .cse0 (and (= |timeShift_processEnvironment_~tmp~5#1| 1) .cse1 .cse2 .cse3 (= |old(~waterLevel~0)| (+ ~waterLevel~0 1))) (and .cse3 .cse4 (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= ~methaneLevelCritical~0 1))) (let ((.cse5 (= ~methaneLevelCritical~0 0))) (or (and .cse2 (not .cse5)) (and .cse5 (= ~pumpRunning~0 1))))) .cse6 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or (not (<= |old(~waterLevel~0)| 1)) .cse1 .cse0 (and .cse2 .cse3 .cse4) (not (<= 1 |old(~waterLevel~0)|)) .cse6) (or .cse2 .cse0 (not (= |old(~pumpRunning~0)| 1)) (not (= |old(~waterLevel~0)| 2)) .cse6))) [2022-11-19 07:56:30,260 INFO L899 garLoopResultBuilder]: For program point L616-1(lines 616 622) no Hoare annotation was computed. [2022-11-19 07:56:30,260 INFO L899 garLoopResultBuilder]: For program point L848(lines 848 854) no Hoare annotation was computed. [2022-11-19 07:56:30,261 INFO L895 garLoopResultBuilder]: At program point timeShiftENTRY(lines 605 628) the Hoare annotation is: (let ((.cse1 (= ~methAndRunningLastTime~0 0)) (.cse2 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse3 (= 0 ~systemActive~0))) (and (or (not (<= |old(~waterLevel~0)| 1)) (not (= |old(~pumpRunning~0)| 0)) .cse0 (and (= ~pumpRunning~0 0) .cse1 .cse2) (not (<= 1 |old(~waterLevel~0)|)) .cse3) (or (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse1 .cse2) .cse0 .cse3 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2022-11-19 07:56:30,261 INFO L899 garLoopResultBuilder]: For program point timeShiftEXIT(lines 605 628) no Hoare annotation was computed. [2022-11-19 07:56:30,261 INFO L899 garLoopResultBuilder]: For program point timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1004) no Hoare annotation was computed. [2022-11-19 07:56:30,261 INFO L902 garLoopResultBuilder]: At program point isMethaneLevelCriticalENTRY(lines 96 104) the Hoare annotation is: true [2022-11-19 07:56:30,261 INFO L899 garLoopResultBuilder]: For program point isMethaneLevelCriticalEXIT(lines 96 104) no Hoare annotation was computed. [2022-11-19 07:56:30,261 INFO L899 garLoopResultBuilder]: For program point L560(lines 560 566) no Hoare annotation was computed. [2022-11-19 07:56:30,262 INFO L895 garLoopResultBuilder]: At program point L560-1(lines 560 566) the Hoare annotation is: (let ((.cse0 (= ~methAndRunningLastTime~0 0)) (.cse1 (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0)) (.cse2 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~tmp~10#1| 1))) (or (and .cse0 (<= 2 ~waterLevel~0) .cse1 .cse2 (<= ~waterLevel~0 2) .cse3) (and (= ~pumpRunning~0 0) .cse0 (<= ~waterLevel~0 1) .cse1 .cse2 (<= 1 ~waterLevel~0) .cse3))) [2022-11-19 07:56:30,262 INFO L895 garLoopResultBuilder]: At program point L585(lines 540 587) the Hoare annotation is: (let ((.cse1 (= ~methAndRunningLastTime~0 0)) (.cse2 (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~tmp~10#1| 1)) (.cse0 (= ~pumpRunning~0 0))) (or (and .cse0 .cse1 (<= ~waterLevel~0 1) .cse2 .cse3 (<= 1 ~waterLevel~0) .cse4) (and .cse1 (= 2 ~waterLevel~0) .cse2 .cse3 .cse4 (let ((.cse5 (= ~methaneLevelCritical~0 0))) (or (and .cse0 (not .cse5)) (and .cse5 (= ~pumpRunning~0 1))))))) [2022-11-19 07:56:30,262 INFO L895 garLoopResultBuilder]: At program point L552(line 552) the Hoare annotation is: (let ((.cse1 (= ~methAndRunningLastTime~0 0)) (.cse2 (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~tmp~10#1| 1)) (.cse0 (= ~pumpRunning~0 0))) (or (and .cse0 .cse1 (<= ~waterLevel~0 1) .cse2 .cse3 (<= 1 ~waterLevel~0) .cse4) (and .cse1 (= 2 ~waterLevel~0) .cse2 .cse3 .cse4 (let ((.cse5 (= ~methaneLevelCritical~0 0))) (or (and .cse0 (not .cse5)) (and .cse5 (= ~pumpRunning~0 1))))))) [2022-11-19 07:56:30,262 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-11-19 07:56:30,263 INFO L895 garLoopResultBuilder]: At program point L986(lines 986 993) the Hoare annotation is: (and (= ~pumpRunning~0 0) (= ~methAndRunningLastTime~0 0) (= ~methaneLevelCritical~0 0) (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0) (= ~waterLevel~0 1) (= |ULTIMATE.start_main_~tmp~10#1| 1)) [2022-11-19 07:56:30,263 INFO L902 garLoopResultBuilder]: At program point L986-2(lines 986 993) the Hoare annotation is: true [2022-11-19 07:56:30,263 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 07:56:30,263 INFO L895 garLoopResultBuilder]: At program point L578-2(lines 570 583) the Hoare annotation is: (let ((.cse0 (= ~methAndRunningLastTime~0 0)) (.cse1 (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0)) (.cse2 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~tmp~10#1| 1))) (or (and .cse0 (<= 2 ~waterLevel~0) .cse1 .cse2 (<= ~waterLevel~0 2) .cse3) (and (= ~pumpRunning~0 0) .cse0 (<= ~waterLevel~0 1) .cse1 .cse2 (<= 1 ~waterLevel~0) .cse3))) [2022-11-19 07:56:30,263 INFO L899 garLoopResultBuilder]: For program point L541(lines 540 587) no Hoare annotation was computed. [2022-11-19 07:56:30,264 INFO L895 garLoopResultBuilder]: At program point L562(line 562) the Hoare annotation is: (let ((.cse0 (= ~pumpRunning~0 0)) (.cse1 (= ~methAndRunningLastTime~0 0)) (.cse2 (= |ULTIMATE.start_main_~tmp~10#1| ~systemActive~0)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~tmp~10#1| 1))) (or (and .cse0 .cse1 (<= ~waterLevel~0 1) .cse2 .cse3 (<= 1 ~waterLevel~0) .cse4) (and (let ((.cse5 (<= 2 ~waterLevel~0))) (or (and .cse1 (= ~methaneLevelCritical~0 0) .cse5 .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse5 .cse2 .cse3 .cse4))) (<= ~waterLevel~0 2)))) [2022-11-19 07:56:30,264 INFO L902 garLoopResultBuilder]: At program point L591(lines 530 595) the Hoare annotation is: true [2022-11-19 07:56:30,264 INFO L899 garLoopResultBuilder]: For program point L550(lines 550 556) no Hoare annotation was computed. [2022-11-19 07:56:30,264 INFO L899 garLoopResultBuilder]: For program point L550-1(lines 550 556) no Hoare annotation was computed. [2022-11-19 07:56:30,264 INFO L895 garLoopResultBuilder]: At program point L588(lines 539 589) the Hoare annotation is: false [2022-11-19 07:56:30,265 INFO L895 garLoopResultBuilder]: At program point processEnvironment__wrappee__highWaterSensorENTRY(lines 637 661) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= ~pumpRunning~0 0)) (.cse2 (= 0 ~systemActive~0)) (.cse3 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 .cse1 (not (<= 1 ~waterLevel~0)) (not (<= ~waterLevel~0 1)) .cse2 .cse3) (or .cse0 .cse1 (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse2 .cse3))) [2022-11-19 07:56:30,265 INFO L895 garLoopResultBuilder]: At program point L727(line 727) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= 0 ~systemActive~0)) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse1 (and (= ~pumpRunning~0 0) (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 1)) .cse2) (or .cse0 (not (<= 1 ~waterLevel~0)) (not (<= ~waterLevel~0 1)) .cse1 .cse2))) [2022-11-19 07:56:30,265 INFO L895 garLoopResultBuilder]: At program point L727-1(line 727) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= 0 ~systemActive~0)) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 (and (= ~pumpRunning~0 0) (= |processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#t~ret39#1| ~methaneLevelCritical~0) (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 1)) (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse1 .cse2) (or .cse0 (not (<= 1 ~waterLevel~0)) (not (<= ~waterLevel~0 1)) .cse1 .cse2))) [2022-11-19 07:56:30,266 INFO L895 garLoopResultBuilder]: At program point L651(line 651) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= 0 ~systemActive~0)) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 (not (<= 1 ~waterLevel~0)) (and (= ~pumpRunning~0 0) (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 0)) (not (<= ~waterLevel~0 1)) .cse1 .cse2) (or .cse0 (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse1 .cse2))) [2022-11-19 07:56:30,266 INFO L899 garLoopResultBuilder]: For program point L645(lines 645 653) no Hoare annotation was computed. [2022-11-19 07:56:30,266 INFO L895 garLoopResultBuilder]: At program point L641(lines 641 658) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= ~pumpRunning~0 0)) (.cse2 (= 0 ~systemActive~0)) (.cse3 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 .cse1 (not (<= 1 ~waterLevel~0)) (not (<= ~waterLevel~0 1)) .cse2 .cse3) (or .cse0 .cse1 (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse2 .cse3))) [2022-11-19 07:56:30,266 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__highWaterSensorEXIT(lines 637 661) no Hoare annotation was computed. [2022-11-19 07:56:30,266 INFO L895 garLoopResultBuilder]: At program point L656(line 656) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= 0 ~systemActive~0)) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 (not (<= 1 ~waterLevel~0)) (not (<= ~waterLevel~0 1)) .cse1 .cse2) (or .cse0 (not (<= ~waterLevel~0 2)) (< ~waterLevel~0 2) .cse1 .cse2))) [2022-11-19 07:56:30,267 INFO L899 garLoopResultBuilder]: For program point L656-1(lines 637 661) no Hoare annotation was computed. [2022-11-19 07:56:30,267 INFO L899 garLoopResultBuilder]: For program point waterRiseEXIT(lines 72 83) no Hoare annotation was computed. [2022-11-19 07:56:30,267 INFO L895 garLoopResultBuilder]: At program point waterRiseENTRY(lines 72 83) the Hoare annotation is: (let ((.cse0 (not (= ~pumpRunning~0 0))) (.cse1 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse2 (= 0 ~systemActive~0)) (.cse3 (not (= ~methAndRunningLastTime~0 0)))) (and (or (not (<= |old(~waterLevel~0)| 1)) .cse0 (not (<= 1 |old(~waterLevel~0)|)) .cse1 .cse2 .cse3) (or (let ((.cse4 (= ~methaneLevelCritical~0 0))) (and (or .cse0 .cse4) (or (not .cse4) (not (= ~pumpRunning~0 1))))) .cse1 .cse2 (not (<= |old(~waterLevel~0)| 2)) .cse3 (not (<= 2 |old(~waterLevel~0)|))))) [2022-11-19 07:56:30,270 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:30,272 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:56:30,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:56:30 BoogieIcfgContainer [2022-11-19 07:56:30,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:56:30,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:56:30,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:56:30,303 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:56:30,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:17" (3/4) ... [2022-11-19 07:56:30,307 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 07:56:30,312 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__base [2022-11-19 07:56:30,312 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure changeMethaneLevel [2022-11-19 07:56:30,313 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure cleanup [2022-11-19 07:56:30,313 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure timeShift [2022-11-19 07:56:30,313 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure isMethaneLevelCritical [2022-11-19 07:56:30,313 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__highWaterSensor [2022-11-19 07:56:30,314 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure waterRise [2022-11-19 07:56:30,320 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 52 nodes and edges [2022-11-19 07:56:30,321 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-19 07:56:30,321 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-19 07:56:30,322 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:56:30,322 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:56:30,349 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && ((((((pumpRunning == \old(pumpRunning) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel) || !(\old(methAndRunningLastTime) == 0)) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) [2022-11-19 07:56:30,350 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && ((((!(\old(methAndRunningLastTime) == 0) || ((pumpRunning == \old(pumpRunning) && methAndRunningLastTime == 0) && ((pumpRunning == 0 && \old(waterLevel) == waterLevel) || (!(pumpRunning == 0) && \old(waterLevel) == waterLevel + 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) [2022-11-19 07:56:30,350 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((!(\old(methAndRunningLastTime) == 0) || ((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1)) || (((methAndRunningLastTime == 0 && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive)) && ((((pumpRunning == 0 || !(\old(methAndRunningLastTime) == 0)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) == 2)) || 0 == systemActive) [2022-11-19 07:56:30,350 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 <= waterLevel)) || !(waterLevel <= 1)) || 0 == systemActive) || !(methAndRunningLastTime == 0)) && (((((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(waterLevel <= 2)) || waterLevel < 2) || 0 == systemActive) || !(methAndRunningLastTime == 0)) [2022-11-19 07:56:30,351 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((!(\old(methAndRunningLastTime) == 0) || (((tmp == 1 && pumpRunning == 0) && \old(waterLevel) == waterLevel + 1) && tmp == methaneLevelCritical)) || (((tmp == methaneLevelCritical && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((((((!(methaneLevelCritical == 0) && \old(waterLevel) == waterLevel) || !(\old(methAndRunningLastTime) == 0)) || (methaneLevelCritical == 0 && !(\old(pumpRunning) == 1))) || ((!(\old(pumpRunning) == 0) && pumpRunning == 0) && methAndRunningLastTime == 0)) || !(\old(waterLevel) == 2)) || (!(\old(pumpRunning) == 0) && !(methaneLevelCritical == 0))) || 0 == systemActive)) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || ((pumpRunning == 0 && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel)) || 0 == systemActive)) && ((((((methAndRunningLastTime == 0 && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1))) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || \old(waterLevel) < 2) || 0 == systemActive) || !(\old(waterLevel) <= 2))) && ((((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || methAndRunningLastTime == 0) || !(1 <= \old(waterLevel))) || !(methaneLevelCritical == 0)) || 0 == systemActive) [2022-11-19 07:56:30,351 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((!(\old(methAndRunningLastTime) == 0) || (((((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1) && tmp___0 == 0) && tmp == methaneLevelCritical) && !(0 == systemActive))) || ((((((methAndRunningLastTime == 0 && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1))) && (methaneLevelCritical == 0 || !(\result == 0))) && (!(aux-isMethaneLevelCritical()-aux == 0) || methaneLevelCritical == 0))) || ((((((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1) && tmp == methaneLevelCritical) && (methaneLevelCritical == 0 || !(\result == 0))) && !(0 == systemActive)) && (!(aux-isMethaneLevelCritical()-aux == 0) || methaneLevelCritical == 0))) || ((((((pumpRunning == 0 && methAndRunningLastTime == 0) && !(methaneLevelCritical == 0)) && tmp___0 == 0) && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && ((((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || methaneLevelCritical == 0) || !(1 <= \old(waterLevel))) || tmp___0 == 0) || 0 == systemActive)) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || (((pumpRunning == 0 && methAndRunningLastTime == 0) && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel)) || 0 == systemActive)) && ((((((!(\old(pumpRunning) == 0) || !(\old(methAndRunningLastTime) == 0)) || methaneLevelCritical == 0) || \old(waterLevel) < 2) || tmp___0 == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2))) && ((((pumpRunning == 0 || !(\old(methAndRunningLastTime) == 0)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) == 2)) || 0 == systemActive) [2022-11-19 07:56:30,351 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(\old(pumpRunning) == 0) || ((pumpRunning == 0 && aux-isMethaneLevelCritical()-aux == methaneLevelCritical) && tmp == 1)) || !(waterLevel <= 2)) || waterLevel < 2) || 0 == systemActive) || !(methAndRunningLastTime == 0)) && ((((!(\old(pumpRunning) == 0) || !(1 <= waterLevel)) || !(waterLevel <= 1)) || 0 == systemActive) || !(methAndRunningLastTime == 0)) [2022-11-19 07:56:30,352 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && (((!(\old(methAndRunningLastTime) == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) [2022-11-19 07:56:30,353 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(methAndRunningLastTime) == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || ((((pumpRunning == \old(pumpRunning) && tmp == 1) && methAndRunningLastTime == 0) && !(pumpRunning == 0)) && \old(waterLevel) == waterLevel + 1)) || !(2 <= \old(waterLevel))) && ((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || 0 == systemActive) [2022-11-19 07:56:30,379 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:56:30,380 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:56:30,380 INFO L158 Benchmark]: Toolchain (without parser) took 73989.43ms. Allocated memory was 96.5MB in the beginning and 861.9MB in the end (delta: 765.5MB). Free memory was 63.1MB in the beginning and 526.4MB in the end (delta: -463.3MB). Peak memory consumption was 301.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,380 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 50.6MB in the beginning and 50.5MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:56:30,381 INFO L158 Benchmark]: CACSL2BoogieTranslator took 601.20ms. Allocated memory is still 96.5MB. Free memory was 62.9MB in the beginning and 63.6MB in the end (delta: -769.7kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.81ms. Allocated memory is still 96.5MB. Free memory was 63.6MB in the beginning and 61.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,381 INFO L158 Benchmark]: Boogie Preprocessor took 64.64ms. Allocated memory is still 96.5MB. Free memory was 61.4MB in the beginning and 59.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,382 INFO L158 Benchmark]: RCFGBuilder took 739.83ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 59.8MB in the beginning and 90.0MB in the end (delta: -30.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,382 INFO L158 Benchmark]: TraceAbstraction took 72412.54ms. Allocated memory was 123.7MB in the beginning and 861.9MB in the end (delta: 738.2MB). Free memory was 89.4MB in the beginning and 531.6MB in the end (delta: -442.2MB). Peak memory consumption was 523.2MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,383 INFO L158 Benchmark]: Witness Printer took 76.96ms. Allocated memory is still 861.9MB. Free memory was 531.6MB in the beginning and 526.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:56:30,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 50.6MB in the beginning and 50.5MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 601.20ms. Allocated memory is still 96.5MB. Free memory was 62.9MB in the beginning and 63.6MB in the end (delta: -769.7kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.81ms. Allocated memory is still 96.5MB. Free memory was 63.6MB in the beginning and 61.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.64ms. Allocated memory is still 96.5MB. Free memory was 61.4MB in the beginning and 59.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 739.83ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 59.8MB in the beginning and 90.0MB in the end (delta: -30.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * TraceAbstraction took 72412.54ms. Allocated memory was 123.7MB in the beginning and 861.9MB in the end (delta: 738.2MB). Free memory was 89.4MB in the beginning and 531.6MB in the end (delta: -442.2MB). Peak memory consumption was 523.2MB. Max. memory is 16.1GB. * Witness Printer took 76.96ms. Allocated memory is still 861.9MB. Free memory was 531.6MB in the beginning and 526.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 1004]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 72.3s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3639 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3613 mSDsluCounter, 2891 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2294 mSDsCounter, 2417 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7957 IncrementalHoareTripleChecker+Invalid, 10374 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2417 mSolverCounterUnsat, 597 mSDtfsCounter, 7957 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1532 GetRequests, 1026 SyntacticMatches, 43 SemanticMatches, 463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22888 ImplicationChecksByTransitivity, 33.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2392occurred in iteration=10, InterpolantAutomatonStates: 284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 1070 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 2807 PreInvPairs, 3052 NumberOfFragments, 1705 HoareAnnotationTreeSize, 2807 FomulaSimplifications, 7065 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 35 FomulaSimplificationsInter, 41457 FormulaSimplificationTreeSizeReductionInter, 5.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1343 ConstructedInterpolants, 0 QuantifiedInterpolants, 4486 SizeOfPredicates, 56 NumberOfNonLiveVariables, 1928 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 20 InterpolantComputations, 7 PerfectInterpolantSequences, 934/1193 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 986]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 560]: Loop Invariant Derived loop invariant: (((((methAndRunningLastTime == 0 && 2 <= waterLevel) && tmp == systemActive) && splverifierCounter == 0) && waterLevel <= 2) && tmp == 1) || ((((((pumpRunning == 0 && methAndRunningLastTime == 0) && waterLevel <= 1) && tmp == systemActive) && splverifierCounter == 0) && 1 <= waterLevel) && tmp == 1) - InvariantResult [Line: 641]: Loop Invariant Derived loop invariant: (((((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 <= waterLevel)) || !(waterLevel <= 1)) || 0 == systemActive) || !(methAndRunningLastTime == 0)) && (((((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(waterLevel <= 2)) || waterLevel < 2) || 0 == systemActive) || !(methAndRunningLastTime == 0)) - InvariantResult [Line: 539]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 605]: Loop Invariant Derived loop invariant: (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && ((((((pumpRunning == \old(pumpRunning) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel) || !(\old(methAndRunningLastTime) == 0)) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) - InvariantResult [Line: 663]: Loop Invariant Derived loop invariant: ((((((!(\old(methAndRunningLastTime) == 0) || ((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1)) || (((methAndRunningLastTime == 0 && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive)) && ((((pumpRunning == 0 || !(\old(methAndRunningLastTime) == 0)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) == 2)) || 0 == systemActive) - InvariantResult [Line: 1004]: Loop Invariant Derived loop invariant: ((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && (((!(\old(methAndRunningLastTime) == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) - InvariantResult [Line: 843]: Loop Invariant Derived loop invariant: ((((((((!(\old(methAndRunningLastTime) == 0) || (((tmp == 1 && pumpRunning == 0) && \old(waterLevel) == waterLevel + 1) && tmp == methaneLevelCritical)) || (((tmp == methaneLevelCritical && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((((((!(methaneLevelCritical == 0) && \old(waterLevel) == waterLevel) || !(\old(methAndRunningLastTime) == 0)) || (methaneLevelCritical == 0 && !(\old(pumpRunning) == 1))) || ((!(\old(pumpRunning) == 0) && pumpRunning == 0) && methAndRunningLastTime == 0)) || !(\old(waterLevel) == 2)) || (!(\old(pumpRunning) == 0) && !(methaneLevelCritical == 0))) || 0 == systemActive)) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || ((pumpRunning == 0 && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel)) || 0 == systemActive)) && ((((((methAndRunningLastTime == 0 && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1))) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || \old(waterLevel) < 2) || 0 == systemActive) || !(\old(waterLevel) <= 2))) && ((((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || methAndRunningLastTime == 0) || !(1 <= \old(waterLevel))) || !(methaneLevelCritical == 0)) || 0 == systemActive) - InvariantResult [Line: 540]: Loop Invariant Derived loop invariant: ((((((pumpRunning == 0 && methAndRunningLastTime == 0) && waterLevel <= 1) && tmp == systemActive) && splverifierCounter == 0) && 1 <= waterLevel) && tmp == 1) || (((((methAndRunningLastTime == 0 && 2 == waterLevel) && tmp == systemActive) && splverifierCounter == 0) && tmp == 1) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1))) - InvariantResult [Line: 835]: Loop Invariant Derived loop invariant: ((((((((((!(\old(methAndRunningLastTime) == 0) || (((((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1) && tmp___0 == 0) && tmp == methaneLevelCritical) && !(0 == systemActive))) || ((((((methAndRunningLastTime == 0 && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1))) && ((pumpRunning == 0 && !(methaneLevelCritical == 0)) || (methaneLevelCritical == 0 && pumpRunning == 1))) && (methaneLevelCritical == 0 || !(\result == 0))) && (!(aux-isMethaneLevelCritical()-aux == 0) || methaneLevelCritical == 0))) || ((((((((tmp == 1 && !(\old(pumpRunning) == 0)) && pumpRunning == 0) && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel + 1) && tmp == methaneLevelCritical) && (methaneLevelCritical == 0 || !(\result == 0))) && !(0 == systemActive)) && (!(aux-isMethaneLevelCritical()-aux == 0) || methaneLevelCritical == 0))) || ((((((pumpRunning == 0 && methAndRunningLastTime == 0) && !(methaneLevelCritical == 0)) && tmp___0 == 0) && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel) && (pumpRunning == \old(pumpRunning) || !(methaneLevelCritical == 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && ((((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || methaneLevelCritical == 0) || !(1 <= \old(waterLevel))) || tmp___0 == 0) || 0 == systemActive)) && (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || (((pumpRunning == 0 && methAndRunningLastTime == 0) && tmp == methaneLevelCritical) && \old(waterLevel) == waterLevel)) || 0 == systemActive)) && ((((((!(\old(pumpRunning) == 0) || !(\old(methAndRunningLastTime) == 0)) || methaneLevelCritical == 0) || \old(waterLevel) < 2) || tmp___0 == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2))) && ((((pumpRunning == 0 || !(\old(methAndRunningLastTime) == 0)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) == 2)) || 0 == systemActive) - InvariantResult [Line: 727]: Loop Invariant Derived loop invariant: (((((!(\old(pumpRunning) == 0) || ((pumpRunning == 0 && aux-isMethaneLevelCritical()-aux == methaneLevelCritical) && tmp == 1)) || !(waterLevel <= 2)) || waterLevel < 2) || 0 == systemActive) || !(methAndRunningLastTime == 0)) && ((((!(\old(pumpRunning) == 0) || !(1 <= waterLevel)) || !(waterLevel <= 1)) || 0 == systemActive) || !(methAndRunningLastTime == 0)) - InvariantResult [Line: 986]: Loop Invariant Derived loop invariant: ((((pumpRunning == 0 && methAndRunningLastTime == 0) && methaneLevelCritical == 0) && tmp == systemActive) && waterLevel == 1) && tmp == 1 - InvariantResult [Line: 530]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 671]: Loop Invariant Derived loop invariant: ((((!(\old(methAndRunningLastTime) == 0) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || ((((pumpRunning == \old(pumpRunning) && tmp == 1) && methAndRunningLastTime == 0) && !(pumpRunning == 0)) && \old(waterLevel) == waterLevel + 1)) || !(2 <= \old(waterLevel))) && ((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || !(1 <= \old(waterLevel))) || 0 == systemActive) - InvariantResult [Line: 667]: Loop Invariant Derived loop invariant: (((((!(\old(waterLevel) <= 1) || !(\old(pumpRunning) == 0)) || !(\old(methAndRunningLastTime) == 0)) || ((pumpRunning == 0 && methAndRunningLastTime == 0) && \old(waterLevel) == waterLevel)) || !(1 <= \old(waterLevel))) || 0 == systemActive) && ((((!(\old(methAndRunningLastTime) == 0) || ((pumpRunning == \old(pumpRunning) && methAndRunningLastTime == 0) && ((pumpRunning == 0 && \old(waterLevel) == waterLevel) || (!(pumpRunning == 0) && \old(waterLevel) == waterLevel + 1)))) || 0 == systemActive) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) - InvariantResult [Line: 914]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 904]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-19 07:56:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47d0a16-1ff5-47ad-abde-09695fb1d60c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE