./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7 --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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:01:51,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:01:51,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:01:51,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:01:51,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:01:51,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:01:51,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:01:51,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:01:51,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:01:51,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:01:51,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:01:51,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:01:51,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:01:51,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:01:51,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:01:51,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:01:51,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:01:51,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:01:51,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:01:51,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:01:51,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:01:51,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:01:51,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:01:51,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:01:51,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:01:51,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:01:51,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:01:51,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:01:51,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:01:52,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:01:52,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:01:52,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:01:52,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:01:52,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:01:52,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:01:52,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:01:52,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:01:52,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:01:52,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:01:52,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:01:52,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:01:52,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:01:52,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:01:52,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:01:52,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:01:52,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:01:52,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:01:52,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:01:52,066 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:01:52,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:01:52,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:01:52,067 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:01:52,068 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:01:52,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:01:52,068 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:01:52,068 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:01:52,069 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:01:52,069 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:01:52,069 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:01:52,069 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:01:52,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:01:52,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:01:52,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:01:52,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:01:52,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:01:52,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:01:52,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:01:52,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:01:52,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:01:52,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:01:52,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:01:52,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:01:52,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:01:52,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:01:52,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:01:52,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:01:52,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:01:52,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:01:52,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:01:52,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:01:52,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:01:52,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:01:52,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:01:52,077 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2021-11-25 20:01:52,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:01:52,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:01:52,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:01:52,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:01:52,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:01:52,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-25 20:01:52,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/data/6e6e8def7/592d3e6de9af4af5b1eac04df18b36c9/FLAGb2506a84e [2021-11-25 20:01:52,932 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:01:52,933 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-25 20:01:52,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/data/6e6e8def7/592d3e6de9af4af5b1eac04df18b36c9/FLAGb2506a84e [2021-11-25 20:01:53,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/data/6e6e8def7/592d3e6de9af4af5b1eac04df18b36c9 [2021-11-25 20:01:53,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:01:53,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:01:53,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:01:53,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:01:53,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:01:53,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c350411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53, skipping insertion in model container [2021-11-25 20:01:53,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:01:53,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:01:53,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-25 20:01:53,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:01:53,672 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:01:53,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-25 20:01:53,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:01:53,770 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:01:53,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53 WrapperNode [2021-11-25 20:01:53,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:01:53,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:01:53,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:01:53,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:01:53,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,827 INFO L137 Inliner]: procedures = 65, calls = 180, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 356 [2021-11-25 20:01:53,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:01:53,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:01:53,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:01:53,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:01:53,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:01:53,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:01:53,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:01:53,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:01:53,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (1/1) ... [2021-11-25 20:01:53,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:01:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:53,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:01:53,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:01:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:01:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2021-11-25 20:01:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2021-11-25 20:01:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:01:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:01:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:01:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:01:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2021-11-25 20:01:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2021-11-25 20:01:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-25 20:01:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-25 20:01:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2021-11-25 20:01:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2021-11-25 20:01:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-11-25 20:01:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-11-25 20:01:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2021-11-25 20:01:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2021-11-25 20:01:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-11-25 20:01:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-11-25 20:01:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-11-25 20:01:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-11-25 20:01:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:01:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-25 20:01:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-25 20:01:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-25 20:01:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-25 20:01:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:01:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:01:54,067 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:01:54,069 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:01:54,564 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:01:54,696 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:01:54,696 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:01:54,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:01:54 BoogieIcfgContainer [2021-11-25 20:01:54,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:01:54,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:01:54,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:01:54,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:01:54,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:01:53" (1/3) ... [2021-11-25 20:01:54,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a46d040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:01:54, skipping insertion in model container [2021-11-25 20:01:54,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:53" (2/3) ... [2021-11-25 20:01:54,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a46d040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:01:54, skipping insertion in model container [2021-11-25 20:01:54,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:01:54" (3/3) ... [2021-11-25 20:01:54,710 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2021-11-25 20:01:54,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:01:54,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:01:54,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:01:54,793 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:01:54,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:01:54,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 20:01:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:01:54,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:54,834 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:54,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2021-11-25 20:01:54,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132083139] [2021-11-25 20:01:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:54,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:01:55,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132083139] [2021-11-25 20:01:55,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132083139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:55,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:55,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:01:55,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683946195] [2021-11-25 20:01:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:55,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:01:55,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:01:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:01:55,142 INFO L87 Difference]: Start difference. First operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:01:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:55,255 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2021-11-25 20:01:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:01:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-25 20:01:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:55,278 INFO L225 Difference]: With dead ends: 204 [2021-11-25 20:01:55,278 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 20:01:55,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:01:55,288 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:55,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:01:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 20:01:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-25 20:01:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 20:01:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2021-11-25 20:01:55,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2021-11-25 20:01:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:55,371 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2021-11-25 20:01:55,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:01:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2021-11-25 20:01:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:01:55,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:55,382 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:55,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:01:55,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2021-11-25 20:01:55,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:55,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741786665] [2021-11-25 20:01:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:55,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:01:55,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:55,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741786665] [2021-11-25 20:01:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741786665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:55,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:55,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:01:55,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029757771] [2021-11-25 20:01:55,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:55,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:01:55,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:01:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:01:55,509 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:01:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:55,599 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2021-11-25 20:01:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:01:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2021-11-25 20:01:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:55,604 INFO L225 Difference]: With dead ends: 167 [2021-11-25 20:01:55,605 INFO L226 Difference]: Without dead ends: 97 [2021-11-25 20:01:55,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:01:55,611 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:55,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:01:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-25 20:01:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-25 20:01:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 73 states have internal predecessors, (79), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-25 20:01:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2021-11-25 20:01:55,628 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2021-11-25 20:01:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:55,628 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2021-11-25 20:01:55,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:01:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2021-11-25 20:01:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:01:55,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:55,631 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:55,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:01:55,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2021-11-25 20:01:55,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81306042] [2021-11-25 20:01:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:55,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:01:55,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:55,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81306042] [2021-11-25 20:01:55,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81306042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:55,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:01:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747726857] [2021-11-25 20:01:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:55,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:01:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:55,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:01:55,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:01:55,828 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-25 20:01:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:56,091 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2021-11-25 20:01:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:01:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-11-25 20:01:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:56,099 INFO L225 Difference]: With dead ends: 235 [2021-11-25 20:01:56,099 INFO L226 Difference]: Without dead ends: 154 [2021-11-25 20:01:56,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:01:56,108 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 81 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:56,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 538 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:01:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-25 20:01:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-11-25 20:01:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 112 states have internal predecessors, (126), 35 states have call successors, (35), 19 states have call predecessors, (35), 19 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-25 20:01:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-11-25 20:01:56,157 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2021-11-25 20:01:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-11-25 20:01:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-25 20:01:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-11-25 20:01:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:01:56,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:56,165 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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, 1] [2021-11-25 20:01:56,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:01:56,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2021-11-25 20:01:56,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627628311] [2021-11-25 20:01:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:56,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:01:56,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627628311] [2021-11-25 20:01:56,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627628311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:56,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:56,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:01:56,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729309612] [2021-11-25 20:01:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:01:56,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:01:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:01:56,385 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-25 20:01:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:56,660 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2021-11-25 20:01:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:01:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) Word has length 67 [2021-11-25 20:01:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:56,664 INFO L225 Difference]: With dead ends: 421 [2021-11-25 20:01:56,664 INFO L226 Difference]: Without dead ends: 287 [2021-11-25 20:01:56,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:01:56,666 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:56,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 440 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:01:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-25 20:01:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2021-11-25 20:01:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 180 states have internal predecessors, (207), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (69), 50 states have call predecessors, (69), 50 states have call successors, (69) [2021-11-25 20:01:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2021-11-25 20:01:56,697 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2021-11-25 20:01:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:56,697 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2021-11-25 20:01:56,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-25 20:01:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2021-11-25 20:01:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:01:56,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:56,700 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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, 1, 1, 1, 1] [2021-11-25 20:01:56,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:01:56,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:56,701 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2021-11-25 20:01:56,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:56,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642413867] [2021-11-25 20:01:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:56,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:01:56,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:56,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642413867] [2021-11-25 20:01:56,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642413867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:56,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:56,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:01:56,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844789571] [2021-11-25 20:01:56,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:56,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:01:56,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:01:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:01:56,844 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 20:01:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:57,537 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2021-11-25 20:01:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:01:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2021-11-25 20:01:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:57,545 INFO L225 Difference]: With dead ends: 593 [2021-11-25 20:01:57,547 INFO L226 Difference]: Without dead ends: 420 [2021-11-25 20:01:57,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:01:57,550 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 412 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:57,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 423 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:01:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-25 20:01:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2021-11-25 20:01:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 253 states have (on average 1.3122529644268774) internal successors, (332), 290 states have internal predecessors, (332), 76 states have call successors, (76), 43 states have call predecessors, (76), 51 states have return successors, (107), 82 states have call predecessors, (107), 76 states have call successors, (107) [2021-11-25 20:01:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2021-11-25 20:01:57,615 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2021-11-25 20:01:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:57,616 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2021-11-25 20:01:57,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 20:01:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2021-11-25 20:01:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 20:01:57,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:57,621 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 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, 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] [2021-11-25 20:01:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:01:57,621 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2021-11-25 20:01:57,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:57,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053238567] [2021-11-25 20:01:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:57,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 20:01:57,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:57,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053238567] [2021-11-25 20:01:57,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053238567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:57,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:57,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:01:57,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170548179] [2021-11-25 20:01:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:57,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:01:57,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:01:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:01:57,744 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:01:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:58,389 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2021-11-25 20:01:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:01:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2021-11-25 20:01:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:58,395 INFO L225 Difference]: With dead ends: 802 [2021-11-25 20:01:58,396 INFO L226 Difference]: Without dead ends: 608 [2021-11-25 20:01:58,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:01:58,398 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 198 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:58,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 804 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:01:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-25 20:01:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2021-11-25 20:01:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 371 states have (on average 1.3099730458221024) internal successors, (486), 420 states have internal predecessors, (486), 104 states have call successors, (104), 67 states have call predecessors, (104), 77 states have return successors, (157), 110 states have call predecessors, (157), 104 states have call successors, (157) [2021-11-25 20:01:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2021-11-25 20:01:58,457 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2021-11-25 20:01:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:58,458 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2021-11-25 20:01:58,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:01:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2021-11-25 20:01:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 20:01:58,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:58,462 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:58,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:01:58,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2021-11-25 20:01:58,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906966332] [2021-11-25 20:01:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:58,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:01:58,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:58,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906966332] [2021-11-25 20:01:58,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906966332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850680620] [2021-11-25 20:01:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:58,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:58,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:58,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:58,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:01:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:01:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:01:59,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 20:01:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850680620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523275638] [2021-11-25 20:01:59,486 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2021-11-25 20:01:59,486 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:59,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:59,496 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:59,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:10,788 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 89 for LOIs [2021-11-25 20:02:10,805 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 86 for LOIs [2021-11-25 20:02:11,124 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 55 for LOIs [2021-11-25 20:02:11,189 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2021-11-25 20:02:11,205 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:02:11,226 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 53 for LOIs [2021-11-25 20:02:11,444 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 57 for LOIs [2021-11-25 20:02:11,450 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:27,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6941#(and (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (= ~__SELECTED_FEATURE_methaneQuery~0 0) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 2 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:27,425 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:27,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:27,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2021-11-25 20:02:27,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738658834] [2021-11-25 20:02:27,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:27,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:02:27,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:02:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:02:27,429 INFO L87 Difference]: Start difference. First operand 553 states and 747 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-25 20:02:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:28,385 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2021-11-25 20:02:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:02:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 106 [2021-11-25 20:02:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:28,392 INFO L225 Difference]: With dead ends: 1099 [2021-11-25 20:02:28,392 INFO L226 Difference]: Without dead ends: 632 [2021-11-25 20:02:28,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 267 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=443, Invalid=4387, Unknown=0, NotChecked=0, Total=4830 [2021-11-25 20:02:28,399 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 256 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:28,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1032 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:02:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-25 20:02:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2021-11-25 20:02:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 356 states have (on average 1.2865168539325842) internal successors, (458), 400 states have internal predecessors, (458), 105 states have call successors, (105), 74 states have call predecessors, (105), 81 states have return successors, (147), 109 states have call predecessors, (147), 105 states have call successors, (147) [2021-11-25 20:02:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2021-11-25 20:02:28,449 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2021-11-25 20:02:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:28,450 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2021-11-25 20:02:28,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-25 20:02:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2021-11-25 20:02:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 20:02:28,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:28,454 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:28,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:28,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:28,669 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2021-11-25 20:02:28,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340268423] [2021-11-25 20:02:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:28,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-25 20:02:28,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:28,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340268423] [2021-11-25 20:02:28,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340268423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:28,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837633707] [2021-11-25 20:02:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:28,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:28,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:28,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:02:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:02:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-25 20:02:29,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:29,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837633707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:29,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:02:29,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-25 20:02:29,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796835295] [2021-11-25 20:02:29,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:29,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:02:29,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:02:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:02:29,119 INFO L87 Difference]: Start difference. First operand 543 states and 710 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:02:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:29,214 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2021-11-25 20:02:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:02:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2021-11-25 20:02:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:29,220 INFO L225 Difference]: With dead ends: 1222 [2021-11-25 20:02:29,220 INFO L226 Difference]: Without dead ends: 714 [2021-11-25 20:02:29,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:02:29,224 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:29,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 254 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:02:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-25 20:02:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2021-11-25 20:02:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 462 states have (on average 1.29004329004329) internal successors, (596), 519 states have internal predecessors, (596), 131 states have call successors, (131), 95 states have call predecessors, (131), 103 states have return successors, (186), 132 states have call predecessors, (186), 131 states have call successors, (186) [2021-11-25 20:02:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2021-11-25 20:02:29,280 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2021-11-25 20:02:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:29,281 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2021-11-25 20:02:29,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:02:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2021-11-25 20:02:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-25 20:02:29,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:29,286 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 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] [2021-11-25 20:02:29,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:02:29,505 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2021-11-25 20:02:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982245429] [2021-11-25 20:02:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 20:02:29,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:29,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982245429] [2021-11-25 20:02:29,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982245429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:29,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034925974] [2021-11-25 20:02:29,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:02:29,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:29,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:29,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:02:29,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:02:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:02:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 20:02:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-25 20:02:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-25 20:02:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034925974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851927346] [2021-11-25 20:02:30,717 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-25 20:02:30,717 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:30,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:30,718 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:30,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:43,477 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 84 for LOIs [2021-11-25 20:02:43,491 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 81 for LOIs [2021-11-25 20:02:44,398 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 93 for LOIs [2021-11-25 20:02:44,594 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2021-11-25 20:02:44,598 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:02:44,614 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 91 for LOIs [2021-11-25 20:02:44,938 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2021-11-25 20:02:44,949 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2021-11-25 20:02:44,954 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:05,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13776#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:05,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:05,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:05,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2021-11-25 20:03:05,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294119416] [2021-11-25 20:03:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:05,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 20:03:05,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 20:03:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=5661, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 20:03:05,774 INFO L87 Difference]: Start difference. First operand 697 states and 913 transitions. Second operand has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2021-11-25 20:03:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:10,736 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2021-11-25 20:03:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-25 20:03:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) Word has length 149 [2021-11-25 20:03:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:10,751 INFO L225 Difference]: With dead ends: 2312 [2021-11-25 20:03:10,751 INFO L226 Difference]: Without dead ends: 1655 [2021-11-25 20:03:10,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 406 SyntacticMatches, 10 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10346 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-11-25 20:03:10,765 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 1935 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 1758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1939 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1758 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:10,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1939 Valid, 2182 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1758 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:03:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-11-25 20:03:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2021-11-25 20:03:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 723 states have (on average 1.2669432918395573) internal successors, (916), 814 states have internal predecessors, (916), 205 states have call successors, (205), 157 states have call predecessors, (205), 175 states have return successors, (315), 209 states have call predecessors, (315), 205 states have call successors, (315) [2021-11-25 20:03:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2021-11-25 20:03:10,873 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2021-11-25 20:03:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2021-11-25 20:03:10,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2021-11-25 20:03:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2021-11-25 20:03:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 20:03:10,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:10,880 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:10,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:11,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:11,105 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2021-11-25 20:03:11,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:11,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008418132] [2021-11-25 20:03:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:11,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 20:03:11,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008418132] [2021-11-25 20:03:11,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008418132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:11,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414723443] [2021-11-25 20:03:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:11,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:11,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:11,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:03:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:03:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 20:03:11,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:11,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414723443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:11,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:11,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-25 20:03:11,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832054892] [2021-11-25 20:03:11,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:11,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:11,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:11,501 INFO L87 Difference]: Start difference. First operand 1104 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:11,690 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2021-11-25 20:03:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2021-11-25 20:03:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:11,704 INFO L225 Difference]: With dead ends: 3011 [2021-11-25 20:03:11,704 INFO L226 Difference]: Without dead ends: 1940 [2021-11-25 20:03:11,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:11,710 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 73 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:11,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 256 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-25 20:03:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2021-11-25 20:03:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1270 states have (on average 1.252755905511811) internal successors, (1591), 1421 states have internal predecessors, (1591), 336 states have call successors, (336), 269 states have call predecessors, (336), 304 states have return successors, (551), 340 states have call predecessors, (551), 336 states have call successors, (551) [2021-11-25 20:03:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2021-11-25 20:03:11,873 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2021-11-25 20:03:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2021-11-25 20:03:11,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2021-11-25 20:03:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 20:03:11,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:11,883 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:11,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:12,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:12,109 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2021-11-25 20:03:12,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:12,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318106456] [2021-11-25 20:03:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:12,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 20:03:12,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318106456] [2021-11-25 20:03:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318106456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430062678] [2021-11-25 20:03:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:12,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:12,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:12,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:03:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:03:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 20:03:12,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:12,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430062678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:12,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:12,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-25 20:03:12,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811887889] [2021-11-25 20:03:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:12,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:12,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:12,510 INFO L87 Difference]: Start difference. First operand 1911 states and 2478 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:12,784 INFO L93 Difference]: Finished difference Result 5373 states and 7275 transitions. [2021-11-25 20:03:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2021-11-25 20:03:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:12,810 INFO L225 Difference]: With dead ends: 5373 [2021-11-25 20:03:12,810 INFO L226 Difference]: Without dead ends: 3480 [2021-11-25 20:03:12,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:12,820 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:12,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-25 20:03:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3460. [2021-11-25 20:03:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 2322 states have (on average 1.2472006890611542) internal successors, (2896), 2573 states have internal predecessors, (2896), 587 states have call successors, (587), 498 states have call predecessors, (587), 550 states have return successors, (1094), 579 states have call predecessors, (1094), 587 states have call successors, (1094) [2021-11-25 20:03:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4577 transitions. [2021-11-25 20:03:13,131 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4577 transitions. Word has length 141 [2021-11-25 20:03:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:13,131 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 4577 transitions. [2021-11-25 20:03:13,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4577 transitions. [2021-11-25 20:03:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:03:13,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:13,175 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 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, 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, 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] [2021-11-25 20:03:13,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:13,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:13,375 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1506060448, now seen corresponding path program 1 times [2021-11-25 20:03:13,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:13,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475937080] [2021-11-25 20:03:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:13,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-25 20:03:13,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475937080] [2021-11-25 20:03:13,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475937080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:13,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:13,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:03:13,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650906824] [2021-11-25 20:03:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:13,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:03:13,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:03:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:03:13,497 INFO L87 Difference]: Start difference. First operand 3460 states and 4577 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 20:03:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:14,266 INFO L93 Difference]: Finished difference Result 8799 states and 11779 transitions. [2021-11-25 20:03:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:03:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-11-25 20:03:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:14,314 INFO L225 Difference]: With dead ends: 8799 [2021-11-25 20:03:14,314 INFO L226 Difference]: Without dead ends: 6593 [2021-11-25 20:03:14,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:03:14,328 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 216 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:14,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 701 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:03:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2021-11-25 20:03:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6559. [2021-11-25 20:03:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 4416 states have (on average 1.247282608695652) internal successors, (5508), 4872 states have internal predecessors, (5508), 1101 states have call successors, (1101), 953 states have call predecessors, (1101), 1041 states have return successors, (2045), 1087 states have call predecessors, (2045), 1101 states have call successors, (2045) [2021-11-25 20:03:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 8654 transitions. [2021-11-25 20:03:14,970 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 8654 transitions. Word has length 145 [2021-11-25 20:03:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 8654 transitions. [2021-11-25 20:03:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 20:03:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 8654 transitions. [2021-11-25 20:03:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:03:14,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:14,993 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:03:14,994 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -788679260, now seen corresponding path program 1 times [2021-11-25 20:03:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821226066] [2021-11-25 20:03:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:14,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 20:03:15,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821226066] [2021-11-25 20:03:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821226066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800510750] [2021-11-25 20:03:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:15,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:15,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:15,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:03:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:03:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 20:03:15,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:15,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800510750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:15,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:15,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-25 20:03:15,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545106557] [2021-11-25 20:03:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:15,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:15,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:15,415 INFO L87 Difference]: Start difference. First operand 6559 states and 8654 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:03:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:15,922 INFO L93 Difference]: Finished difference Result 10241 states and 13415 transitions. [2021-11-25 20:03:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 145 [2021-11-25 20:03:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:15,967 INFO L225 Difference]: With dead ends: 10241 [2021-11-25 20:03:15,967 INFO L226 Difference]: Without dead ends: 6839 [2021-11-25 20:03:15,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:15,983 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 69 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:15,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 292 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-11-25 20:03:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 5525. [2021-11-25 20:03:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5525 states, 3736 states have (on average 1.243576017130621) internal successors, (4646), 4114 states have internal predecessors, (4646), 914 states have call successors, (914), 810 states have call predecessors, (914), 874 states have return successors, (1471), 896 states have call predecessors, (1471), 914 states have call successors, (1471) [2021-11-25 20:03:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 7031 transitions. [2021-11-25 20:03:16,496 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 7031 transitions. Word has length 145 [2021-11-25 20:03:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 5525 states and 7031 transitions. [2021-11-25 20:03:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:03:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 7031 transitions. [2021-11-25 20:03:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 20:03:16,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:16,517 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:16,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:16,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:03:16,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2021-11-25 20:03:16,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:16,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053635748] [2021-11-25 20:03:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:16,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-25 20:03:16,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053635748] [2021-11-25 20:03:16,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053635748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794521993] [2021-11-25 20:03:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:16,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:16,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:16,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:16,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:03:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:03:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 20:03:17,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:17,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794521993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:17,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:17,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-25 20:03:17,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133831980] [2021-11-25 20:03:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:17,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:17,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:17,173 INFO L87 Difference]: Start difference. First operand 5525 states and 7031 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:17,676 INFO L93 Difference]: Finished difference Result 8119 states and 10228 transitions. [2021-11-25 20:03:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2021-11-25 20:03:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:17,722 INFO L225 Difference]: With dead ends: 8119 [2021-11-25 20:03:17,722 INFO L226 Difference]: Without dead ends: 5557 [2021-11-25 20:03:17,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:17,733 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 62 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:17,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2021-11-25 20:03:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5499. [2021-11-25 20:03:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3715 states have (on average 1.2398384925975774) internal successors, (4606), 4092 states have internal predecessors, (4606), 915 states have call successors, (915), 814 states have call predecessors, (915), 868 states have return successors, (1308), 886 states have call predecessors, (1308), 915 states have call successors, (1308) [2021-11-25 20:03:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2021-11-25 20:03:18,171 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 143 [2021-11-25 20:03:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2021-11-25 20:03:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 20:03:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2021-11-25 20:03:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:03:18,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:18,190 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:18,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:03:18,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2021-11-25 20:03:18,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870520040] [2021-11-25 20:03:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:18,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-25 20:03:18,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870520040] [2021-11-25 20:03:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870520040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752727562] [2021-11-25 20:03:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:18,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:18,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:18,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:03:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 20:03:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 20:03:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 20:03:20,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752727562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000467845] [2021-11-25 20:03:20,721 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-25 20:03:20,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:20,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:20,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:20,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:28,618 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 85 for LOIs [2021-11-25 20:03:28,632 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 86 for LOIs [2021-11-25 20:03:28,961 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 55 for LOIs [2021-11-25 20:03:29,154 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2021-11-25 20:03:29,165 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:03:29,182 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 57 for LOIs [2021-11-25 20:03:29,379 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2021-11-25 20:03:29,386 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 63 for LOIs [2021-11-25 20:03:29,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:47,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '111024#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:47,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:47,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:47,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 11] total 33 [2021-11-25 20:03:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406108396] [2021-11-25 20:03:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:47,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 20:03:47,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 20:03:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=6604, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 20:03:47,784 INFO L87 Difference]: Start difference. First operand 5499 states and 6829 transitions. Second operand has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-25 20:03:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:54,012 INFO L93 Difference]: Finished difference Result 15929 states and 21378 transitions. [2021-11-25 20:03:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-25 20:03:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) Word has length 145 [2021-11-25 20:03:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:54,084 INFO L225 Difference]: With dead ends: 15929 [2021-11-25 20:03:54,084 INFO L226 Difference]: Without dead ends: 13100 [2021-11-25 20:03:54,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 394 SyntacticMatches, 13 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10356 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1914, Invalid=20736, Unknown=0, NotChecked=0, Total=22650 [2021-11-25 20:03:54,108 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 2770 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 5132 mSolverCounterSat, 1759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 6891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1759 IncrementalHoareTripleChecker+Valid, 5132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:54,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2778 Valid, 2039 Invalid, 6891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1759 Valid, 5132 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:03:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-11-25 20:03:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8689. [2021-11-25 20:03:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 5909 states have (on average 1.2359113217126418) internal successors, (7303), 6461 states have internal predecessors, (7303), 1445 states have call successors, (1445), 1260 states have call predecessors, (1445), 1334 states have return successors, (1966), 1390 states have call predecessors, (1966), 1445 states have call successors, (1966) [2021-11-25 20:03:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 10714 transitions. [2021-11-25 20:03:55,042 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 10714 transitions. Word has length 145 [2021-11-25 20:03:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:55,043 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 10714 transitions. [2021-11-25 20:03:55,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-25 20:03:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 10714 transitions. [2021-11-25 20:03:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 20:03:55,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:55,072 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:55,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:55,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:55,286 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2021-11-25 20:03:55,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502818145] [2021-11-25 20:03:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:55,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-25 20:03:55,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502818145] [2021-11-25 20:03:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502818145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854631747] [2021-11-25 20:03:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:55,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:55,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:55,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:55,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:03:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:03:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 20:03:55,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854631747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:55,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-25 20:03:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808620543] [2021-11-25 20:03:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:55,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:55,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:55,725 INFO L87 Difference]: Start difference. First operand 8689 states and 10714 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:03:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:56,301 INFO L93 Difference]: Finished difference Result 18612 states and 23370 transitions. [2021-11-25 20:03:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 175 [2021-11-25 20:03:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:56,343 INFO L225 Difference]: With dead ends: 18612 [2021-11-25 20:03:56,343 INFO L226 Difference]: Without dead ends: 10251 [2021-11-25 20:03:56,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:56,370 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:56,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2021-11-25 20:03:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 10203. [2021-11-25 20:03:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 7006 states have (on average 1.2259491864116472) internal successors, (8589), 7551 states have internal predecessors, (8589), 1624 states have call successors, (1624), 1515 states have call predecessors, (1624), 1572 states have return successors, (2395), 1543 states have call predecessors, (2395), 1624 states have call successors, (2395) [2021-11-25 20:03:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 12608 transitions. [2021-11-25 20:03:57,301 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 12608 transitions. Word has length 175 [2021-11-25 20:03:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 12608 transitions. [2021-11-25 20:03:57,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:03:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 12608 transitions. [2021-11-25 20:03:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 20:03:57,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:57,333 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1] [2021-11-25 20:03:57,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:57,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:03:57,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2021-11-25 20:03:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:57,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110878517] [2021-11-25 20:03:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:57,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 20:03:58,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110878517] [2021-11-25 20:03:58,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110878517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938070921] [2021-11-25 20:03:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:58,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:58,016 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:58,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:03:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:03:58,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 20:03:59,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-25 20:04:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938070921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:01,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054819275] [2021-11-25 20:04:01,412 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-25 20:04:01,412 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:01,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:01,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:01,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:12,244 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 76 for LOIs [2021-11-25 20:04:12,252 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 79 for LOIs [2021-11-25 20:04:13,038 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 91 for LOIs [2021-11-25 20:04:13,207 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2021-11-25 20:04:13,211 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:04:13,227 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 89 for LOIs [2021-11-25 20:04:13,715 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2021-11-25 20:04:13,726 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 86 for LOIs [2021-11-25 20:04:13,742 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2021-11-25 20:04:13,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:34,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193979#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:34,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:34,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:34,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 17] total 43 [2021-11-25 20:04:34,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541531605] [2021-11-25 20:04:34,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:34,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 20:04:34,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 20:04:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=9457, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 20:04:34,484 INFO L87 Difference]: Start difference. First operand 10203 states and 12608 transitions. Second operand has 43 states, 37 states have (on average 5.756756756756757) internal successors, (213), 40 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2021-11-25 20:04:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:40,323 INFO L93 Difference]: Finished difference Result 18742 states and 23051 transitions. [2021-11-25 20:04:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 20:04:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 5.756756756756757) internal successors, (213), 40 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) Word has length 178 [2021-11-25 20:04:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:40,360 INFO L225 Difference]: With dead ends: 18742 [2021-11-25 20:04:40,360 INFO L226 Difference]: Without dead ends: 9997 [2021-11-25 20:04:40,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 477 SyntacticMatches, 12 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9817 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1879, Invalid=20471, Unknown=0, NotChecked=0, Total=22350 [2021-11-25 20:04:40,385 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 2989 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 2185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2185 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:40,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2996 Valid, 2290 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2185 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 20:04:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9997 states. [2021-11-25 20:04:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9997 to 9764. [2021-11-25 20:04:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 6682 states have (on average 1.210565698892547) internal successors, (8089), 7165 states have internal predecessors, (8089), 1582 states have call successors, (1582), 1473 states have call predecessors, (1582), 1499 states have return successors, (2146), 1511 states have call predecessors, (2146), 1582 states have call successors, (2146) [2021-11-25 20:04:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 11817 transitions. [2021-11-25 20:04:41,256 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 11817 transitions. Word has length 178 [2021-11-25 20:04:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:41,257 INFO L470 AbstractCegarLoop]: Abstraction has 9764 states and 11817 transitions. [2021-11-25 20:04:41,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 5.756756756756757) internal successors, (213), 40 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2021-11-25 20:04:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 11817 transitions. [2021-11-25 20:04:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-25 20:04:41,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:41,285 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:41,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:41,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:04:41,501 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash -633347556, now seen corresponding path program 1 times [2021-11-25 20:04:41,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:41,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749636708] [2021-11-25 20:04:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:41,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 24 proven. 131 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 20:04:42,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749636708] [2021-11-25 20:04:42,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749636708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720994741] [2021-11-25 20:04:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:42,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:42,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:42,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:04:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 20:04:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 153 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-25 20:04:43,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-25 20:04:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720994741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899507760] [2021-11-25 20:04:46,125 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-25 20:04:46,125 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:46,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:46,126 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:46,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:52,716 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 82 for LOIs [2021-11-25 20:04:52,730 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 85 for LOIs [2021-11-25 20:04:53,312 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 77 for LOIs [2021-11-25 20:04:53,761 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2021-11-25 20:04:53,766 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:04:53,783 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 77 for LOIs [2021-11-25 20:04:54,121 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 60 for LOIs [2021-11-25 20:04:54,126 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 77 for LOIs [2021-11-25 20:04:54,131 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 85 for LOIs [2021-11-25 20:04:54,143 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:18,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238673#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~systemActive~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= 0 ~__SELECTED_FEATURE_methaneAlarm~0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= ~__SELECTED_FEATURE_methaneAlarm~0 0) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:18,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:18,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:18,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 14] total 51 [2021-11-25 20:05:18,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596764805] [2021-11-25 20:05:18,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:18,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:05:18,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:05:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=9870, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 20:05:18,103 INFO L87 Difference]: Start difference. First operand 9764 states and 11817 transitions. Second operand has 51 states, 49 states have (on average 5.571428571428571) internal successors, (273), 49 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 33 states have call predecessors, (72), 35 states have call successors, (72) [2021-11-25 20:05:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:29,727 INFO L93 Difference]: Finished difference Result 23749 states and 30340 transitions. [2021-11-25 20:05:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-25 20:05:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 5.571428571428571) internal successors, (273), 49 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 33 states have call predecessors, (72), 35 states have call successors, (72) Word has length 190 [2021-11-25 20:05:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:29,794 INFO L225 Difference]: With dead ends: 23749 [2021-11-25 20:05:29,794 INFO L226 Difference]: Without dead ends: 16041 [2021-11-25 20:05:29,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 523 SyntacticMatches, 38 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20278 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=3395, Invalid=36805, Unknown=0, NotChecked=0, Total=40200 [2021-11-25 20:05:29,821 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 5915 mSDsluCounter, 4411 mSDsCounter, 0 mSdLazyCounter, 9676 mSolverCounterSat, 4416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5922 SdHoareTripleChecker+Valid, 3973 SdHoareTripleChecker+Invalid, 14092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4416 IncrementalHoareTripleChecker+Valid, 9676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5922 Valid, 3973 Invalid, 14092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4416 Valid, 9676 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 20:05:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16041 states. [2021-11-25 20:05:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16041 to 11870. [2021-11-25 20:05:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11870 states, 8107 states have (on average 1.2093252744541754) internal successors, (9804), 8698 states have internal predecessors, (9804), 1923 states have call successors, (1923), 1819 states have call predecessors, (1923), 1839 states have return successors, (2707), 1825 states have call predecessors, (2707), 1923 states have call successors, (2707) [2021-11-25 20:05:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11870 states to 11870 states and 14434 transitions. [2021-11-25 20:05:31,100 INFO L78 Accepts]: Start accepts. Automaton has 11870 states and 14434 transitions. Word has length 190 [2021-11-25 20:05:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:31,102 INFO L470 AbstractCegarLoop]: Abstraction has 11870 states and 14434 transitions. [2021-11-25 20:05:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 5.571428571428571) internal successors, (273), 49 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 33 states have call predecessors, (72), 35 states have call successors, (72) [2021-11-25 20:05:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 11870 states and 14434 transitions. [2021-11-25 20:05:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-25 20:05:31,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:31,123 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:31,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:31,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:05:31,349 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:05:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash 231449596, now seen corresponding path program 2 times [2021-11-25 20:05:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396037828] [2021-11-25 20:05:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:31,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 39 proven. 184 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 20:05:31,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396037828] [2021-11-25 20:05:31,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396037828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607042153] [2021-11-25 20:05:31,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:05:31,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:31,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:31,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:31,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:05:32,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:05:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:05:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 20:05:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 147 proven. 131 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 20:05:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 126 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-25 20:05:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607042153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745663633] [2021-11-25 20:05:35,895 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-25 20:05:35,895 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:05:35,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:05:35,896 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:05:35,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:05:46,716 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 76 for LOIs [2021-11-25 20:05:46,724 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 79 for LOIs [2021-11-25 20:05:47,484 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 83 for LOIs [2021-11-25 20:05:47,608 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2021-11-25 20:05:47,612 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-25 20:05:47,628 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 81 for LOIs [2021-11-25 20:05:48,039 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2021-11-25 20:05:48,050 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 78 for LOIs [2021-11-25 20:05:48,061 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2021-11-25 20:05:48,066 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:06:09,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294372#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-25 20:06:09,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:06:09,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:09,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 22] total 67 [2021-11-25 20:06:09,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873431498] [2021-11-25 20:06:09,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:09,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-25 20:06:09,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:09,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-25 20:06:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=14259, Unknown=0, NotChecked=0, Total=15750 [2021-11-25 20:06:09,829 INFO L87 Difference]: Start difference. First operand 11870 states and 14434 transitions. Second operand has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 44 states have call successors, (80), 18 states have call predecessors, (80), 29 states have return successors, (85), 44 states have call predecessors, (85), 44 states have call successors, (85) [2021-11-25 20:06:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:16,425 INFO L93 Difference]: Finished difference Result 21202 states and 25829 transitions. [2021-11-25 20:06:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 20:06:16,432 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 44 states have call successors, (80), 18 states have call predecessors, (80), 29 states have return successors, (85), 44 states have call predecessors, (85), 44 states have call successors, (85) Word has length 217 [2021-11-25 20:06:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:16,439 INFO L225 Difference]: With dead ends: 21202 [2021-11-25 20:06:16,440 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 20:06:16,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 587 SyntacticMatches, 7 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15824 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=4212, Invalid=31698, Unknown=0, NotChecked=0, Total=35910 [2021-11-25 20:06:16,480 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 3189 mSDsluCounter, 4000 mSDsCounter, 0 mSdLazyCounter, 6667 mSolverCounterSat, 2279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3192 SdHoareTripleChecker+Valid, 3755 SdHoareTripleChecker+Invalid, 8946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2279 IncrementalHoareTripleChecker+Valid, 6667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:16,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3192 Valid, 3755 Invalid, 8946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2279 Valid, 6667 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 20:06:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 20:06:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 20:06:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 20:06:16,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2021-11-25 20:06:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:16,487 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 20:06:16,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 44 states have call successors, (80), 18 states have call predecessors, (80), 29 states have return successors, (85), 44 states have call predecessors, (85), 44 states have call successors, (85) [2021-11-25 20:06:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 20:06:16,488 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 20:06:16,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:06:16,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:16,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0f615-a598-464c-ba22-6aecf07a5413/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:16,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 20:07:17,300 WARN L227 SmtUtils]: Spent 23.83s on a formula simplification. DAG size of input: 1099 DAG size of output: 897 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:08:26,008 WARN L227 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 1246 DAG size of output: 1195 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:09:47,805 WARN L227 SmtUtils]: Spent 56.93s on a formula simplification. DAG size of input: 535 DAG size of output: 437 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:11:24,173 WARN L227 SmtUtils]: Spent 1.60m on a formula simplification. DAG size of input: 1651 DAG size of output: 1338 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:11:37,413 WARN L227 SmtUtils]: Spent 11.51s on a formula simplification. DAG size of input: 941 DAG size of output: 738 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:12:07,973 WARN L227 SmtUtils]: Spent 27.91s on a formula simplification. DAG size of input: 1189 DAG size of output: 974 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 20:12:18,259 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 961 DAG size of output: 65 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:12:27,374 WARN L227 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 1009 DAG size of output: 96 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:12:51,233 WARN L227 SmtUtils]: Spent 23.75s on a formula simplification. DAG size of input: 1749 DAG size of output: 107 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:13:08,798 WARN L227 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 1044 DAG size of output: 83 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:13:33,404 WARN L227 SmtUtils]: Spent 24.52s on a formula simplification. DAG size of input: 1749 DAG size of output: 107 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:14:01,728 WARN L227 SmtUtils]: Spent 24.75s on a formula simplification. DAG size of input: 1727 DAG size of output: 120 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:14:11,518 WARN L227 SmtUtils]: Spent 9.73s on a formula simplification. DAG size of input: 1017 DAG size of output: 86 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:14:20,734 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 897 DAG size of output: 58 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-25 20:14:29,215 WARN L227 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 1116 DAG size of output: 64 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)