./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e91d5c860cfea17112af53939b2fffb1e4c536355098377ab18c754994d1bc2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:42:11,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:42:11,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:42:12,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:42:12,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:42:12,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:42:12,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:42:12,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:42:12,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:42:12,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:42:12,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:42:12,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:42:12,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:42:12,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:42:12,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:42:12,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:42:12,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:42:12,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:42:12,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:42:12,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:42:12,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:42:12,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:42:12,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:42:12,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:42:12,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:42:12,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:42:12,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:42:12,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:42:12,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:42:12,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:42:12,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:42:12,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:42:12,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:42:12,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:42:12,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:42:12,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:42:12,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:42:12,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:42:12,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:42:12,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:42:12,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:42:12,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:42:12,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:42:12,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:42:12,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:42:12,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:42:12,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:42:12,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:42:12,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:42:12,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:42:12,089 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:42:12,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:42:12,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:42:12,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:42:12,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:42:12,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:42:12,091 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:42:12,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:42:12,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:42:12,091 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:42:12,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:42:12,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:42:12,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:42:12,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:42:12,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:42:12,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:42:12,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:42:12,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:42:12,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:42:12,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:42:12,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:42:12,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:42:12,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:42:12,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:42:12,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:42:12,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:42:12,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:42:12,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:42:12,096 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:42:12,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:42:12,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:42:12,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:42:12,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:42:12,097 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_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e91d5c860cfea17112af53939b2fffb1e4c536355098377ab18c754994d1bc2b [2021-11-23 02:42:12,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:42:12,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:42:12,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:42:12,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:42:12,381 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:42:12,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c [2021-11-23 02:42:12,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/data/2b7e26c63/c6b42e30a2ae42cf9e35d8b5368d7f4e/FLAG65a4d7568 [2021-11-23 02:42:13,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:42:13,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c [2021-11-23 02:42:13,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/data/2b7e26c63/c6b42e30a2ae42cf9e35d8b5368d7f4e/FLAG65a4d7568 [2021-11-23 02:42:13,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/data/2b7e26c63/c6b42e30a2ae42cf9e35d8b5368d7f4e [2021-11-23 02:42:13,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:42:13,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:42:13,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:42:13,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:42:13,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:42:13,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:13" (1/1) ... [2021-11-23 02:42:13,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@114f5cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:13, skipping insertion in model container [2021-11-23 02:42:13,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:13" (1/1) ... [2021-11-23 02:42:13,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:42:13,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:42:13,844 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_710214ba-5112-4f10-9c97-0c082466f004/sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c[15987,16000] [2021-11-23 02:42:13,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:42:13,874 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:42:13,978 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_710214ba-5112-4f10-9c97-0c082466f004/sv-benchmarks/c/product-lines/minepump_spec4_product53.cil.c[15987,16000] [2021-11-23 02:42:13,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:42:14,008 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:42:14,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14 WrapperNode [2021-11-23 02:42:14,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:42:14,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:42:14,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:42:14,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:42:14,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,079 INFO L137 Inliner]: procedures = 56, calls = 158, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 281 [2021-11-23 02:42:14,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:42:14,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:42:14,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:42:14,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:42:14,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:42:14,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:42:14,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:42:14,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:42:14,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (1/1) ... [2021-11-23 02:42:14,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:42:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:14,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:42:14,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:42:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:42:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2021-11-23 02:42:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2021-11-23 02:42:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:42:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:42:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:42:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:42:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2021-11-23 02:42:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2021-11-23 02:42:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-23 02:42:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-23 02:42:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2021-11-23 02:42:14,259 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2021-11-23 02:42:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-11-23 02:42:14,259 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-11-23 02:42:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:42:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-23 02:42:14,259 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-23 02:42:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:42:14,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:42:14,363 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:42:14,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:42:14,734 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:42:14,862 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:42:14,863 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:42:14,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:14 BoogieIcfgContainer [2021-11-23 02:42:14,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:42:14,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:42:14,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:42:14,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:42:14,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:42:13" (1/3) ... [2021-11-23 02:42:14,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571c0a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:14, skipping insertion in model container [2021-11-23 02:42:14,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:14" (2/3) ... [2021-11-23 02:42:14,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571c0a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:14, skipping insertion in model container [2021-11-23 02:42:14,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:14" (3/3) ... [2021-11-23 02:42:14,878 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product53.cil.c [2021-11-23 02:42:14,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:42:14,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:42:14,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:42:14,964 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:42:14,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:42:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 02:42:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:42:15,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:15,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:15,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2066788619, now seen corresponding path program 1 times [2021-11-23 02:42:15,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:15,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296196577] [2021-11-23 02:42:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:15,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:15,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296196577] [2021-11-23 02:42:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296196577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:15,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:42:15,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443422779] [2021-11-23 02:42:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:42:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:42:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:42:15,300 INFO L87 Difference]: Start difference. First operand has 62 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:15,373 INFO L93 Difference]: Finished difference Result 122 states and 167 transitions. [2021-11-23 02:42:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:42:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 02:42:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:15,385 INFO L225 Difference]: With dead ends: 122 [2021-11-23 02:42:15,386 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:42:15,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:42:15,394 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:15,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:42:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 02:42:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 44 states have internal predecessors, (47), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:42:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2021-11-23 02:42:15,440 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 12 [2021-11-23 02:42:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:15,441 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2021-11-23 02:42:15,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2021-11-23 02:42:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:42:15,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:15,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:15,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:42:15,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1228171401, now seen corresponding path program 1 times [2021-11-23 02:42:15,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:15,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310314085] [2021-11-23 02:42:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:15,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:15,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:15,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310314085] [2021-11-23 02:42:15,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310314085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:15,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:15,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:42:15,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307286739] [2021-11-23 02:42:15,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:15,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:42:15,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:42:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:15,547 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:15,623 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-11-23 02:42:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:42:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 02:42:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:15,626 INFO L225 Difference]: With dead ends: 91 [2021-11-23 02:42:15,626 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 02:42:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:15,628 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:15,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 02:42:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 02:42:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 02:42:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2021-11-23 02:42:15,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 13 [2021-11-23 02:42:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2021-11-23 02:42:15,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2021-11-23 02:42:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:42:15,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:15,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:15,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:42:15,653 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1384655328, now seen corresponding path program 1 times [2021-11-23 02:42:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252577308] [2021-11-23 02:42:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:15,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:15,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252577308] [2021-11-23 02:42:15,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252577308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:15,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:15,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:42:15,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163471196] [2021-11-23 02:42:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:15,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:42:15,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:42:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:15,747 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:15,807 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-11-23 02:42:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:42:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 02:42:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:15,809 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:42:15,809 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 02:42:15,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:15,812 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:15,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 02:42:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 02:42:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 02:42:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-11-23 02:42:15,832 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 15 [2021-11-23 02:42:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:15,833 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-11-23 02:42:15,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:42:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-11-23 02:42:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:42:15,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:15,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:42:15,837 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash 16176383, now seen corresponding path program 1 times [2021-11-23 02:42:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848842670] [2021-11-23 02:42:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:15,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:15,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848842670] [2021-11-23 02:42:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848842670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:15,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:15,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:42:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751410684] [2021-11-23 02:42:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:15,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:42:15,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:42:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:15,941 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:42:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:16,065 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2021-11-23 02:42:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:42:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-23 02:42:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:16,071 INFO L225 Difference]: With dead ends: 130 [2021-11-23 02:42:16,071 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 02:42:16,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:16,083 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:16,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 97 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 02:42:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-11-23 02:42:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 61 states have internal predecessors, (67), 14 states have call successors, (14), 13 states have call predecessors, (14), 13 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2021-11-23 02:42:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-11-23 02:42:16,123 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 21 [2021-11-23 02:42:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:16,124 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-11-23 02:42:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:42:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-11-23 02:42:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:42:16,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:16,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:16,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:42:16,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1946255968, now seen corresponding path program 1 times [2021-11-23 02:42:16,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239855317] [2021-11-23 02:42:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:16,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:16,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239855317] [2021-11-23 02:42:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239855317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:16,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:16,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:42:16,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776953707] [2021-11-23 02:42:16,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:16,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:42:16,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:42:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:16,307 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:42:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:16,503 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2021-11-23 02:42:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:42:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 02:42:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:16,515 INFO L225 Difference]: With dead ends: 226 [2021-11-23 02:42:16,515 INFO L226 Difference]: Without dead ends: 147 [2021-11-23 02:42:16,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:42:16,523 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:16,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 203 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-23 02:42:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2021-11-23 02:42:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 91 states have internal predecessors, (98), 19 states have call successors, (19), 18 states have call predecessors, (19), 21 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2021-11-23 02:42:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-11-23 02:42:16,570 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 28 [2021-11-23 02:42:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:16,571 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-11-23 02:42:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:42:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-11-23 02:42:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:42:16,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:16,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:16,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:42:16,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1628976253, now seen corresponding path program 1 times [2021-11-23 02:42:16,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491107628] [2021-11-23 02:42:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:16,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:16,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491107628] [2021-11-23 02:42:16,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491107628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:16,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:16,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:42:16,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450089578] [2021-11-23 02:42:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:16,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:42:16,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:42:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:42:16,764 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:42:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:17,401 INFO L93 Difference]: Finished difference Result 296 states and 368 transitions. [2021-11-23 02:42:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:42:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-11-23 02:42:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:17,404 INFO L225 Difference]: With dead ends: 296 [2021-11-23 02:42:17,405 INFO L226 Difference]: Without dead ends: 217 [2021-11-23 02:42:17,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:42:17,406 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 136 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:17,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 314 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:42:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-23 02:42:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 198. [2021-11-23 02:42:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 149 states have internal predecessors, (160), 31 states have call successors, (31), 27 states have call predecessors, (31), 34 states have return successors, (46), 32 states have call predecessors, (46), 31 states have call successors, (46) [2021-11-23 02:42:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 237 transitions. [2021-11-23 02:42:17,436 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 237 transitions. Word has length 31 [2021-11-23 02:42:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:17,437 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 237 transitions. [2021-11-23 02:42:17,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:42:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 237 transitions. [2021-11-23 02:42:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:42:17,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:17,440 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:42:17,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:42:17,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -327777137, now seen corresponding path program 1 times [2021-11-23 02:42:17,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:17,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804562549] [2021-11-23 02:42:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:17,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:42:17,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:17,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804562549] [2021-11-23 02:42:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804562549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:17,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:42:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729955496] [2021-11-23 02:42:17,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:42:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:42:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:42:17,493 INFO L87 Difference]: Start difference. First operand 198 states and 237 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:42:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:17,620 INFO L93 Difference]: Finished difference Result 525 states and 644 transitions. [2021-11-23 02:42:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:42:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-11-23 02:42:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:17,630 INFO L225 Difference]: With dead ends: 525 [2021-11-23 02:42:17,630 INFO L226 Difference]: Without dead ends: 439 [2021-11-23 02:42:17,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:17,633 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:17,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 173 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-23 02:42:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 399. [2021-11-23 02:42:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 276 states have (on average 1.2246376811594204) internal successors, (338), 302 states have internal predecessors, (338), 55 states have call successors, (55), 49 states have call predecessors, (55), 67 states have return successors, (89), 63 states have call predecessors, (89), 55 states have call successors, (89) [2021-11-23 02:42:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 482 transitions. [2021-11-23 02:42:17,714 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 482 transitions. Word has length 47 [2021-11-23 02:42:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 482 transitions. [2021-11-23 02:42:17,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:42:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 482 transitions. [2021-11-23 02:42:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:42:17,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:17,718 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:42:17,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:42:17,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -112617442, now seen corresponding path program 1 times [2021-11-23 02:42:17,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518872026] [2021-11-23 02:42:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:17,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:17,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:17,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518872026] [2021-11-23 02:42:17,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518872026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:17,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:42:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125716170] [2021-11-23 02:42:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:17,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:42:17,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:42:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:42:17,900 INFO L87 Difference]: Start difference. First operand 399 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:42:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:18,551 INFO L93 Difference]: Finished difference Result 737 states and 924 transitions. [2021-11-23 02:42:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:42:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-11-23 02:42:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:18,559 INFO L225 Difference]: With dead ends: 737 [2021-11-23 02:42:18,559 INFO L226 Difference]: Without dead ends: 546 [2021-11-23 02:42:18,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:42:18,561 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 239 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:18,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 134 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:42:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-23 02:42:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 491. [2021-11-23 02:42:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 340 states have (on average 1.25) internal successors, (425), 372 states have internal predecessors, (425), 67 states have call successors, (67), 57 states have call predecessors, (67), 83 states have return successors, (123), 78 states have call predecessors, (123), 67 states have call successors, (123) [2021-11-23 02:42:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 615 transitions. [2021-11-23 02:42:18,666 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 615 transitions. Word has length 50 [2021-11-23 02:42:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:18,669 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 615 transitions. [2021-11-23 02:42:18,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:42:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 615 transitions. [2021-11-23 02:42:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:42:18,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:18,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:18,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:42:18,675 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1132066367, now seen corresponding path program 1 times [2021-11-23 02:42:18,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:18,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776648840] [2021-11-23 02:42:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:18,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:18,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776648840] [2021-11-23 02:42:18,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776648840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421305002] [2021-11-23 02:42:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:18,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:18,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:18,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:42:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:42:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:42:19,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:42:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421305002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752164899] [2021-11-23 02:42:20,234 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2021-11-23 02:42:20,235 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:20,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:20,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:20,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:29,915 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 309 for LOIs [2021-11-23 02:42:29,998 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2021-11-23 02:42:30,190 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 25 for LOIs [2021-11-23 02:42:30,245 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 25 for LOIs [2021-11-23 02:42:30,271 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 38 for LOIs [2021-11-23 02:42:30,276 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 29 for LOIs [2021-11-23 02:42:30,279 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:39,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6277#(and (<= ~methaneLevelCritical~0 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~4#1|) (= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= 1 ~systemActive~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (<= 0 ~pumpRunning~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~4#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:39,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:39,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:39,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 11] total 30 [2021-11-23 02:42:39,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520421846] [2021-11-23 02:42:39,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:39,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 02:42:39,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 02:42:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3088, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:42:39,912 INFO L87 Difference]: Start difference. First operand 491 states and 615 transitions. Second operand has 30 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-23 02:42:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:43,938 INFO L93 Difference]: Finished difference Result 1305 states and 1701 transitions. [2021-11-23 02:42:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-23 02:42:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) Word has length 53 [2021-11-23 02:42:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:43,946 INFO L225 Difference]: With dead ends: 1305 [2021-11-23 02:42:43,946 INFO L226 Difference]: Without dead ends: 1002 [2021-11-23 02:42:43,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1422, Invalid=11234, Unknown=0, NotChecked=0, Total=12656 [2021-11-23 02:42:43,953 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1231 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:43,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 680 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:42:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-23 02:42:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 450. [2021-11-23 02:42:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 307 states have (on average 1.1693811074918568) internal successors, (359), 330 states have internal predecessors, (359), 62 states have call successors, (62), 60 states have call predecessors, (62), 80 states have return successors, (84), 74 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-23 02:42:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 505 transitions. [2021-11-23 02:42:44,004 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 505 transitions. Word has length 53 [2021-11-23 02:42:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:44,005 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 505 transitions. [2021-11-23 02:42:44,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-23 02:42:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 505 transitions. [2021-11-23 02:42:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 02:42:44,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:44,007 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:42:44,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:44,227 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1638342415, now seen corresponding path program 2 times [2021-11-23 02:42:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30978360] [2021-11-23 02:42:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:44,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:42:44,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30978360] [2021-11-23 02:42:44,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30978360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363726759] [2021-11-23 02:42:44,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:42:44,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:44,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:42:44,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:42:44,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:42:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:42:44,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:42:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363726759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:44,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:42:44,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2021-11-23 02:42:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977595244] [2021-11-23 02:42:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:44,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:42:44,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:42:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:42:44,835 INFO L87 Difference]: Start difference. First operand 450 states and 505 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:42:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:44,982 INFO L93 Difference]: Finished difference Result 885 states and 1009 transitions. [2021-11-23 02:42:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:42:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 79 [2021-11-23 02:42:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:44,989 INFO L225 Difference]: With dead ends: 885 [2021-11-23 02:42:44,989 INFO L226 Difference]: Without dead ends: 498 [2021-11-23 02:42:44,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:42:44,992 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:44,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 204 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-23 02:42:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 448. [2021-11-23 02:42:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 305 states have (on average 1.157377049180328) internal successors, (353), 328 states have internal predecessors, (353), 62 states have call successors, (62), 60 states have call predecessors, (62), 80 states have return successors, (84), 74 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-23 02:42:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 499 transitions. [2021-11-23 02:42:45,039 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 499 transitions. Word has length 79 [2021-11-23 02:42:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 499 transitions. [2021-11-23 02:42:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:42:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 499 transitions. [2021-11-23 02:42:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:42:45,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:45,045 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:45,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:45,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:42:45,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1865703158, now seen corresponding path program 1 times [2021-11-23 02:42:45,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:45,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386797711] [2021-11-23 02:42:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:45,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:42:45,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386797711] [2021-11-23 02:42:45,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386797711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623633880] [2021-11-23 02:42:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:45,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:45,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:45,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:42:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:42:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:42:45,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:42:46,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623633880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957567662] [2021-11-23 02:42:46,078 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-23 02:42:46,078 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:46,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:46,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:46,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:54,131 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 309 for LOIs [2021-11-23 02:42:54,223 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2021-11-23 02:42:54,367 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 25 for LOIs [2021-11-23 02:42:54,429 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 25 for LOIs [2021-11-23 02:42:54,574 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 38 for LOIs [2021-11-23 02:42:54,580 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 26 for LOIs [2021-11-23 02:42:54,583 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 29 for LOIs [2021-11-23 02:42:54,588 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:03,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11992#(and (<= ~methaneLevelCritical~0 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~4#1|) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (<= |#NULL.offset| 0) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~4#1|) (<= 0 |#NULL.offset|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 02:43:03,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:43:03,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:43:03,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2021-11-23 02:43:03,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156559216] [2021-11-23 02:43:03,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:43:03,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:43:03,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:43:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2589, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 02:43:03,993 INFO L87 Difference]: Start difference. First operand 448 states and 499 transitions. Second operand has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 9 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-23 02:43:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:07,299 INFO L93 Difference]: Finished difference Result 1358 states and 1566 transitions. [2021-11-23 02:43:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 02:43:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 9 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 82 [2021-11-23 02:43:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:07,308 INFO L225 Difference]: With dead ends: 1358 [2021-11-23 02:43:07,308 INFO L226 Difference]: Without dead ends: 973 [2021-11-23 02:43:07,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 216 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1113, Invalid=9393, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 02:43:07,314 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1078 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:07,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 486 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:43:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-23 02:43:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 713. [2021-11-23 02:43:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 480 states have (on average 1.14375) internal successors, (549), 522 states have internal predecessors, (549), 99 states have call successors, (99), 95 states have call predecessors, (99), 133 states have return successors, (149), 116 states have call predecessors, (149), 99 states have call successors, (149) [2021-11-23 02:43:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 797 transitions. [2021-11-23 02:43:07,391 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 797 transitions. Word has length 82 [2021-11-23 02:43:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 797 transitions. [2021-11-23 02:43:07,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 9 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-23 02:43:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 797 transitions. [2021-11-23 02:43:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:43:07,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:07,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:43:07,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:07,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:07,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1673710427, now seen corresponding path program 1 times [2021-11-23 02:43:07,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71560561] [2021-11-23 02:43:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:07,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:43:07,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:07,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71560561] [2021-11-23 02:43:07,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71560561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:43:07,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259744866] [2021-11-23 02:43:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:07,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:07,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:07,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:43:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:43:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:43:08,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:43:08,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259744866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:08,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:43:08,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2021-11-23 02:43:08,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401304722] [2021-11-23 02:43:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:08,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:08,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:43:08,246 INFO L87 Difference]: Start difference. First operand 713 states and 797 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:43:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:08,454 INFO L93 Difference]: Finished difference Result 1496 states and 1702 transitions. [2021-11-23 02:43:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:43:08,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 83 [2021-11-23 02:43:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:08,460 INFO L225 Difference]: With dead ends: 1496 [2021-11-23 02:43:08,460 INFO L226 Difference]: Without dead ends: 780 [2021-11-23 02:43:08,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:43:08,464 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 49 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:08,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 264 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-23 02:43:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2021-11-23 02:43:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 529 states have (on average 1.1474480151228734) internal successors, (607), 568 states have internal predecessors, (607), 108 states have call successors, (108), 104 states have call predecessors, (108), 132 states have return successors, (150), 120 states have call predecessors, (150), 108 states have call successors, (150) [2021-11-23 02:43:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 865 transitions. [2021-11-23 02:43:08,538 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 865 transitions. Word has length 83 [2021-11-23 02:43:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:08,539 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 865 transitions. [2021-11-23 02:43:08,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:43:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 865 transitions. [2021-11-23 02:43:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:43:08,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:08,547 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:08,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:08,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:08,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash -671607394, now seen corresponding path program 3 times [2021-11-23 02:43:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617530758] [2021-11-23 02:43:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:43:09,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617530758] [2021-11-23 02:43:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617530758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:43:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093309820] [2021-11-23 02:43:09,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:43:09,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:09,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:43:09,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:43:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:43:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 02:43:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:43:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:43:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:43:10,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093309820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:43:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889138387] [2021-11-23 02:43:10,609 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2021-11-23 02:43:10,609 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:43:10,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:43:10,610 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:43:10,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:43:17,085 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 309 for LOIs [2021-11-23 02:43:17,166 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2021-11-23 02:43:17,310 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 25 for LOIs [2021-11-23 02:43:17,359 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 25 for LOIs [2021-11-23 02:43:17,399 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 38 for LOIs [2021-11-23 02:43:17,404 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 29 for LOIs [2021-11-23 02:43:17,407 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:26,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19738#(and (<= ~methaneLevelCritical~0 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~4#1|) (= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= 1 ~systemActive~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (<= 0 ~pumpRunning~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~4#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 02:43:26,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:43:26,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:43:26,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 39 [2021-11-23 02:43:26,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659193403] [2021-11-23 02:43:26,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:43:26,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:43:26,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:43:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4082, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:43:26,354 INFO L87 Difference]: Start difference. First operand 770 states and 865 transitions. Second operand has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 19 states have call successors, (26), 9 states have call predecessors, (26), 17 states have return successors, (29), 20 states have call predecessors, (29), 19 states have call successors, (29) [2021-11-23 02:43:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:27,938 INFO L93 Difference]: Finished difference Result 985 states and 1123 transitions. [2021-11-23 02:43:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:43:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 19 states have call successors, (26), 9 states have call predecessors, (26), 17 states have return successors, (29), 20 states have call predecessors, (29), 19 states have call successors, (29) Word has length 98 [2021-11-23 02:43:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:27,940 INFO L225 Difference]: With dead ends: 985 [2021-11-23 02:43:27,940 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:43:27,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 254 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1028, Invalid=6982, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 02:43:27,945 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 860 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:27,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 260 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:43:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:43:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:43:27,947 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) [2021-11-23 02:43:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:43:27,947 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-11-23 02:43:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:27,947 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:43:27,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 19 states have call successors, (26), 9 states have call predecessors, (26), 17 states have return successors, (29), 20 states have call predecessors, (29), 19 states have call successors, (29) [2021-11-23 02:43:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:43:27,948 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:43:27,950 INFO L764 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:43:27,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:28,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:43:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:43:33,766 INFO L854 garLoopResultBuilder]: At program point deactivatePumpENTRY(lines 615 622) the Hoare annotation is: (or (not (= ~waterLevel~0 1)) (not (= 1 ~systemActive~0)) (not (= |old(~pumpRunning~0)| 1)) (= ~pumpRunning~0 1)) [2021-11-23 02:43:33,766 INFO L858 garLoopResultBuilder]: For program point deactivatePumpEXIT(lines 615 622) no Hoare annotation was computed. [2021-11-23 02:43:33,766 INFO L858 garLoopResultBuilder]: For program point processEnvironment__wrappee__baseEXIT(lines 522 528) no Hoare annotation was computed. [2021-11-23 02:43:33,767 INFO L861 garLoopResultBuilder]: At program point processEnvironment__wrappee__baseFINAL(lines 522 528) the Hoare annotation is: true [2021-11-23 02:43:33,767 INFO L861 garLoopResultBuilder]: At program point changeMethaneLevelENTRY(lines 792 803) the Hoare annotation is: true [2021-11-23 02:43:33,767 INFO L858 garLoopResultBuilder]: For program point changeMethaneLevelEXIT(lines 792 803) no Hoare annotation was computed. [2021-11-23 02:43:33,767 INFO L858 garLoopResultBuilder]: For program point cleanupEXIT(lines 896 925) no Hoare annotation was computed. [2021-11-23 02:43:33,767 INFO L861 garLoopResultBuilder]: At program point cleanupENTRY(lines 896 925) the Hoare annotation is: true [2021-11-23 02:43:33,767 INFO L861 garLoopResultBuilder]: At program point L921(lines 896 925) the Hoare annotation is: true [2021-11-23 02:43:33,768 INFO L858 garLoopResultBuilder]: For program point L917(line 917) no Hoare annotation was computed. [2021-11-23 02:43:33,768 INFO L858 garLoopResultBuilder]: For program point L910(lines 910 914) no Hoare annotation was computed. [2021-11-23 02:43:33,768 INFO L861 garLoopResultBuilder]: At program point L910-1(lines 910 914) the Hoare annotation is: true [2021-11-23 02:43:33,768 INFO L861 garLoopResultBuilder]: At program point L906-2(lines 906 920) the Hoare annotation is: true [2021-11-23 02:43:33,768 INFO L861 garLoopResultBuilder]: At program point L902(line 902) the Hoare annotation is: true [2021-11-23 02:43:33,768 INFO L858 garLoopResultBuilder]: For program point L902-1(line 902) no Hoare annotation was computed. [2021-11-23 02:43:33,769 INFO L854 garLoopResultBuilder]: At program point L601(line 601) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse2 (= ~pumpRunning~0 0)) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1 (and .cse2 (= ~waterLevel~0 1))) (or .cse0 .cse1 (and .cse2 (= 2 ~waterLevel~0)) (not (= |old(~waterLevel~0)| 2))) (or .cse1 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2021-11-23 02:43:33,769 INFO L854 garLoopResultBuilder]: At program point L601-1(lines 582 606) the Hoare annotation is: (let ((.cse2 (and (= ~pumpRunning~0 0) (= ~waterLevel~0 1))) (.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1 .cse2) (or .cse1 (not (= |old(~pumpRunning~0)| 1)) .cse2 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 .cse1 (and (<= ~waterLevel~0 |old(~waterLevel~0)|) (<= |old(~waterLevel~0)| ~waterLevel~0) (= ~pumpRunning~0 1)) (not (= |old(~waterLevel~0)| 2))))) [2021-11-23 02:43:33,769 INFO L858 garLoopResultBuilder]: For program point L502-1(lines 501 520) no Hoare annotation was computed. [2021-11-23 02:43:33,769 INFO L858 garLoopResultBuilder]: For program point L590(lines 590 598) no Hoare annotation was computed. [2021-11-23 02:43:33,769 INFO L854 garLoopResultBuilder]: At program point L586(lines 586 603) the Hoare annotation is: (let ((.cse0 (= ~waterLevel~0 1)) (.cse2 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0))) (.cse3 (= ~pumpRunning~0 0))) (and (or (and .cse0 (= ~pumpRunning~0 1)) .cse1 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse2 (not (= |old(~waterLevel~0)| 1)) .cse1 (and .cse3 .cse0)) (or .cse2 .cse1 (and .cse3 (= 2 ~waterLevel~0)) (not (= |old(~waterLevel~0)| 2))))) [2021-11-23 02:43:33,770 INFO L854 garLoopResultBuilder]: At program point L760(line 760) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= |old(~waterLevel~0)| 2))) (or .cse1 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1))) [2021-11-23 02:43:33,770 INFO L854 garLoopResultBuilder]: At program point L509-1(lines 509 515) the Hoare annotation is: (let ((.cse2 (and (= ~pumpRunning~0 0) (= ~waterLevel~0 1))) (.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1 .cse2) (or .cse1 (not (= |old(~pumpRunning~0)| 1)) .cse2 (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 .cse1 (and (<= ~waterLevel~0 |old(~waterLevel~0)|) (<= |old(~waterLevel~0)| ~waterLevel~0) (= ~pumpRunning~0 1)) (not (= |old(~waterLevel~0)| 2))))) [2021-11-23 02:43:33,770 INFO L854 garLoopResultBuilder]: At program point L596(line 596) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= |old(~waterLevel~0)| 2))) (or .cse1 (not (= |old(~pumpRunning~0)| 1)) (and (= |timeShift_processEnvironment_~tmp~6#1| 0) (= ~waterLevel~0 1) (= ~pumpRunning~0 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1))) [2021-11-23 02:43:33,770 INFO L858 garLoopResultBuilder]: For program point L881(lines 881 887) no Hoare annotation was computed. [2021-11-23 02:43:33,770 INFO L854 garLoopResultBuilder]: At program point L592(line 592) the Hoare annotation is: (let ((.cse1 (not (= |old(~pumpRunning~0)| 1))) (.cse2 (not (<= |old(~waterLevel~0)| 2))) (.cse3 (not (<= 2 |old(~waterLevel~0)|))) (.cse4 (not (= |old(~pumpRunning~0)| 0))) (.cse0 (not (= 1 ~systemActive~0)))) (and (or (and (= ~waterLevel~0 1) (= ~pumpRunning~0 1)) .cse0 .cse1 .cse2 .cse3) (or .cse4 .cse0 (not (= |old(~waterLevel~0)| 2))) (or .cse0 (not (= ~methaneLevelCritical~0 0)) .cse1 .cse2 .cse3) (or .cse4 (not (= |old(~waterLevel~0)| 1)) .cse0))) [2021-11-23 02:43:33,771 INFO L854 garLoopResultBuilder]: At program point timeShiftENTRY(lines 498 521) the Hoare annotation is: (let ((.cse1 (= 1 ~systemActive~0))) (let ((.cse2 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse3 (not (= |old(~pumpRunning~0)| 0))) (.cse0 (= ~pumpRunning~0 0)) (.cse4 (not .cse1))) (and (or (and .cse0 .cse1 .cse2) .cse3 .cse4 (not (= |old(~waterLevel~0)| 2))) (or .cse4 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (and .cse2 (= ~pumpRunning~0 1)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse3 (and .cse0 .cse1 (= ~waterLevel~0 1)) (not (= |old(~waterLevel~0)| 1)) .cse4)))) [2021-11-23 02:43:33,771 INFO L854 garLoopResultBuilder]: At program point L877(lines 877 890) the Hoare annotation is: (let ((.cse3 (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| ~waterLevel~0))) (let ((.cse2 (and (= ~pumpRunning~0 0) .cse3 (= ~waterLevel~0 1))) (.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1 .cse2) (or .cse1 .cse2 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 .cse1 (not (= |old(~waterLevel~0)| 2)) (and .cse3 (<= ~waterLevel~0 |old(~waterLevel~0)|) (<= |old(~waterLevel~0)| ~waterLevel~0) (= ~pumpRunning~0 1)))))) [2021-11-23 02:43:33,771 INFO L854 garLoopResultBuilder]: At program point L877-1(lines 869 893) the Hoare annotation is: (let ((.cse3 (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| ~waterLevel~0))) (let ((.cse2 (and (= ~pumpRunning~0 0) .cse3 (= ~waterLevel~0 1))) (.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 (not (= |old(~waterLevel~0)| 1)) .cse1 .cse2) (or .cse1 .cse2 (not (= |old(~pumpRunning~0)| 1)) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))) (or .cse0 .cse1 (not (= |old(~waterLevel~0)| 2)) (and .cse3 (<= ~waterLevel~0 |old(~waterLevel~0)|) (<= |old(~waterLevel~0)| ~waterLevel~0) (= ~pumpRunning~0 1)))))) [2021-11-23 02:43:33,771 INFO L858 garLoopResultBuilder]: For program point timeShiftEXIT(lines 498 521) no Hoare annotation was computed. [2021-11-23 02:43:33,772 INFO L858 garLoopResultBuilder]: For program point timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION(line 760) no Hoare annotation was computed. [2021-11-23 02:43:33,772 INFO L854 garLoopResultBuilder]: At program point L473(lines 430 475) the Hoare annotation is: (let ((.cse0 (= 1 ~systemActive~0)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) .cse0 .cse1 (= ~waterLevel~0 1)) (and (= 2 ~waterLevel~0) .cse0 .cse1 (= ~pumpRunning~0 1)))) [2021-11-23 02:43:33,772 INFO L858 garLoopResultBuilder]: For program point L440(lines 440 446) no Hoare annotation was computed. [2021-11-23 02:43:33,772 INFO L858 garLoopResultBuilder]: For program point L440-1(lines 440 446) no Hoare annotation was computed. [2021-11-23 02:43:33,772 INFO L854 garLoopResultBuilder]: At program point L977(lines 977 984) the Hoare annotation is: (and (= ~pumpRunning~0 0) (= ~methaneLevelCritical~0 0) (= 1 ~systemActive~0) (= ~waterLevel~0 1)) [2021-11-23 02:43:33,772 INFO L861 garLoopResultBuilder]: At program point L977-2(lines 977 984) the Hoare annotation is: true [2021-11-23 02:43:33,773 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-11-23 02:43:33,773 INFO L854 garLoopResultBuilder]: At program point L466-2(lines 460 471) the Hoare annotation is: (let ((.cse0 (= ~pumpRunning~0 0)) (.cse3 (= 2 ~waterLevel~0)) (.cse1 (= 1 ~systemActive~0)) (.cse2 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and .cse0 .cse1 .cse2 (= ~waterLevel~0 1)) (and .cse0 .cse3 .cse1 .cse2) (and .cse3 .cse1 .cse2 (= ~pumpRunning~0 1)))) [2021-11-23 02:43:33,773 INFO L858 garLoopResultBuilder]: For program point L450(lines 450 456) no Hoare annotation was computed. [2021-11-23 02:43:33,773 INFO L858 garLoopResultBuilder]: For program point L450-1(lines 450 456) no Hoare annotation was computed. [2021-11-23 02:43:33,773 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 02:43:33,773 INFO L861 garLoopResultBuilder]: At program point L479(lines 420 483) the Hoare annotation is: true [2021-11-23 02:43:33,774 INFO L854 garLoopResultBuilder]: At program point L442(line 442) the Hoare annotation is: (let ((.cse0 (= 1 ~systemActive~0)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) .cse0 .cse1 (= ~waterLevel~0 1)) (and (= 2 ~waterLevel~0) .cse0 .cse1 (= ~pumpRunning~0 1)))) [2021-11-23 02:43:33,774 INFO L854 garLoopResultBuilder]: At program point L476(lines 429 477) the Hoare annotation is: false [2021-11-23 02:43:33,774 INFO L858 garLoopResultBuilder]: For program point L431(lines 430 475) no Hoare annotation was computed. [2021-11-23 02:43:33,774 INFO L854 garLoopResultBuilder]: At program point L452(line 452) the Hoare annotation is: (let ((.cse0 (= ~pumpRunning~0 0)) (.cse1 (= 1 ~systemActive~0)) (.cse2 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and .cse0 .cse1 .cse2 (= ~waterLevel~0 1)) (and .cse0 (= 2 ~waterLevel~0) .cse1 .cse2) (and (<= 2 ~waterLevel~0) .cse1 .cse2 (<= ~waterLevel~0 2) (= ~pumpRunning~0 1)))) [2021-11-23 02:43:33,774 INFO L854 garLoopResultBuilder]: At program point processEnvironment__wrappee__highWaterSensorENTRY(lines 530 554) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= ~pumpRunning~0 0)) (.cse2 (not (= 1 ~systemActive~0)))) (and (or (not (= ~waterLevel~0 1)) .cse0 .cse1 .cse2) (or .cse0 .cse1 .cse2 (not (= 2 ~waterLevel~0))))) [2021-11-23 02:43:33,775 INFO L854 garLoopResultBuilder]: At program point L544(line 544) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= 2 ~waterLevel~0))) (or (not (= ~waterLevel~0 1)) .cse0 .cse1 (and (= ~pumpRunning~0 0) (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 0))))) [2021-11-23 02:43:33,775 INFO L858 garLoopResultBuilder]: For program point processEnvironment__wrappee__highWaterSensorEXIT(lines 530 554) no Hoare annotation was computed. [2021-11-23 02:43:33,775 INFO L854 garLoopResultBuilder]: At program point L538(lines 538 546) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0))) (.cse2 (= ~pumpRunning~0 0))) (and (or .cse0 .cse1 (not (= 2 ~waterLevel~0)) (and .cse2 (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 1))) (or (not (= ~waterLevel~0 1)) .cse0 .cse1 (and .cse2 (= |processEnvironment__wrappee__highWaterSensor_~tmp~4#1| 0))))) [2021-11-23 02:43:33,775 INFO L854 garLoopResultBuilder]: At program point L534(lines 534 551) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (= ~pumpRunning~0 0)) (.cse2 (not (= 1 ~systemActive~0)))) (and (or (not (= ~waterLevel~0 1)) .cse0 .cse1 .cse2) (or .cse0 .cse1 .cse2 (not (= 2 ~waterLevel~0))))) [2021-11-23 02:43:33,775 INFO L854 garLoopResultBuilder]: At program point L549(line 549) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= 2 ~waterLevel~0))) (or (not (= ~waterLevel~0 1)) .cse0 .cse1))) [2021-11-23 02:43:33,775 INFO L858 garLoopResultBuilder]: For program point L549-1(lines 530 554) no Hoare annotation was computed. [2021-11-23 02:43:33,776 INFO L858 garLoopResultBuilder]: For program point waterRiseEXIT(lines 780 791) no Hoare annotation was computed. [2021-11-23 02:43:33,776 INFO L854 garLoopResultBuilder]: At program point waterRiseENTRY(lines 780 791) the Hoare annotation is: (let ((.cse0 (not (= 1 ~systemActive~0)))) (and (or (not (= ~pumpRunning~0 0)) (not (= |old(~waterLevel~0)| 1)) .cse0 (= ~waterLevel~0 1)) (or .cse0 (not (= ~pumpRunning~0 1)) (= |old(~waterLevel~0)| ~waterLevel~0) (not (<= |old(~waterLevel~0)| 2)) (not (<= 2 |old(~waterLevel~0)|))))) [2021-11-23 02:43:33,776 INFO L854 garLoopResultBuilder]: At program point processEnvironment__wrappee__lowWaterSensorENTRY(lines 556 580) the Hoare annotation is: (let ((.cse0 (not (= ~waterLevel~0 1))) (.cse2 (not (= |old(~pumpRunning~0)| 0))) (.cse3 (= ~pumpRunning~0 0)) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= |old(~pumpRunning~0)| 1)) (= ~pumpRunning~0 1)) (or .cse0 .cse2 .cse3 .cse1) (or .cse2 .cse3 .cse1 (not (= 2 ~waterLevel~0))))) [2021-11-23 02:43:33,776 INFO L854 garLoopResultBuilder]: At program point L570(line 570) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse2 (not (= ~waterLevel~0 1))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= 2 ~waterLevel~0))) (or .cse2 .cse0 .cse1) (or .cse2 .cse1 (not (= |old(~pumpRunning~0)| 1))))) [2021-11-23 02:43:33,776 INFO L854 garLoopResultBuilder]: At program point L566(line 566) the Hoare annotation is: (let ((.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse2 (not (= ~waterLevel~0 1))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= 2 ~waterLevel~0))) (or .cse2 .cse0 .cse1) (or .cse2 .cse1 (and (<= 1 |processEnvironment__wrappee__lowWaterSensor_~tmp~5#1|) (= ~pumpRunning~0 1)) (not (= |old(~pumpRunning~0)| 1))))) [2021-11-23 02:43:33,776 INFO L858 garLoopResultBuilder]: For program point L564(lines 564 572) no Hoare annotation was computed. [2021-11-23 02:43:33,777 INFO L854 garLoopResultBuilder]: At program point L560(lines 560 577) the Hoare annotation is: (let ((.cse0 (not (= ~waterLevel~0 1))) (.cse2 (not (= |old(~pumpRunning~0)| 0))) (.cse3 (= ~pumpRunning~0 0)) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (not (= |old(~pumpRunning~0)| 1)) (= ~pumpRunning~0 1)) (or .cse0 .cse2 .cse3 .cse1) (or .cse2 .cse3 .cse1 (not (= 2 ~waterLevel~0))))) [2021-11-23 02:43:33,777 INFO L854 garLoopResultBuilder]: At program point L575(line 575) the Hoare annotation is: (let ((.cse0 (not (= ~waterLevel~0 1))) (.cse1 (not (= |old(~pumpRunning~0)| 0))) (.cse2 (= ~pumpRunning~0 0)) (.cse3 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 .cse2 .cse3) (or .cse0 .cse3 (not (= |old(~pumpRunning~0)| 1))) (or .cse1 .cse2 .cse3 (not (= 2 ~waterLevel~0))))) [2021-11-23 02:43:33,777 INFO L858 garLoopResultBuilder]: For program point L575-1(lines 556 580) no Hoare annotation was computed. [2021-11-23 02:43:33,777 INFO L858 garLoopResultBuilder]: For program point processEnvironment__wrappee__lowWaterSensorEXIT(lines 556 580) no Hoare annotation was computed. [2021-11-23 02:43:33,780 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:33,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:43:33,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:43:33 BoogieIcfgContainer [2021-11-23 02:43:33,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:43:33,807 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:43:33,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:43:33,808 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:43:33,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:14" (3/4) ... [2021-11-23 02:43:33,811 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 02:43:33,816 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure deactivatePump [2021-11-23 02:43:33,816 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__base [2021-11-23 02:43:33,816 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure changeMethaneLevel [2021-11-23 02:43:33,817 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cleanup [2021-11-23 02:43:33,817 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure timeShift [2021-11-23 02:43:33,817 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__highWaterSensor [2021-11-23 02:43:33,817 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure waterRise [2021-11-23 02:43:33,817 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__lowWaterSensor [2021-11-23 02:43:33,828 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 79 nodes and edges [2021-11-23 02:43:33,829 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2021-11-23 02:43:33,829 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-23 02:43:33,830 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 02:43:33,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 02:43:33,832 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:43:33,832 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:43:33,856 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((pumpRunning == 0 && 1 == systemActive) && \old(waterLevel) == waterLevel) || !(\old(pumpRunning) == 0)) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || (\old(waterLevel) == waterLevel && pumpRunning == 1)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || ((pumpRunning == 0 && 1 == systemActive) && waterLevel == 1)) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) [2021-11-23 02:43:33,857 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || (pumpRunning == 0 && waterLevel == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || ((waterLevel <= \old(waterLevel) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) || !(\old(waterLevel) == 2)) [2021-11-23 02:43:33,857 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((waterLevel == 1 && pumpRunning == 1) || !(1 == systemActive)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || (pumpRunning == 0 && 2 == waterLevel)) || !(\old(waterLevel) == 2)) [2021-11-23 02:43:33,858 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || (pumpRunning == 0 && waterLevel == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || ((waterLevel <= \old(waterLevel) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) || !(\old(waterLevel) == 2)) [2021-11-23 02:43:33,858 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(waterLevel == 1) || !(1 == systemActive)) || !(\old(pumpRunning) == 1)) || pumpRunning == 1) && (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || pumpRunning == 0) || !(1 == systemActive))) && (((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 == systemActive)) || !(2 == waterLevel)) [2021-11-23 02:43:33,858 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || pumpRunning == 0) || !(1 == systemActive)) && (((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 == systemActive)) || !(2 == waterLevel)) [2021-11-23 02:43:33,859 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) && ((((!(1 == systemActive) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) || (((tmp == waterLevel && waterLevel <= \old(waterLevel)) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) [2021-11-23 02:43:33,859 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) && ((((!(1 == systemActive) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) || (((tmp == waterLevel && waterLevel <= \old(waterLevel)) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) [2021-11-23 02:43:33,860 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) && (((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && ((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) [2021-11-23 02:43:33,861 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(2 == waterLevel)) || (pumpRunning == 0 && tmp == 1)) && (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || !(1 == systemActive)) || (pumpRunning == 0 && tmp == 0)) [2021-11-23 02:43:33,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:43:33,891 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:43:33,891 INFO L158 Benchmark]: Toolchain (without parser) took 80509.77ms. Allocated memory was 123.7MB in the beginning and 522.2MB in the end (delta: 398.5MB). Free memory was 83.6MB in the beginning and 376.0MB in the end (delta: -292.4MB). Peak memory consumption was 105.5MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,892 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:43:33,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 622.34ms. Allocated memory is still 123.7MB. Free memory was 83.4MB in the beginning and 91.6MB in the end (delta: -8.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.72ms. Allocated memory is still 123.7MB. Free memory was 91.2MB in the beginning and 88.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,893 INFO L158 Benchmark]: Boogie Preprocessor took 61.75ms. Allocated memory is still 123.7MB. Free memory was 88.7MB in the beginning and 87.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,893 INFO L158 Benchmark]: RCFGBuilder took 723.08ms. Allocated memory is still 123.7MB. Free memory was 87.0MB in the beginning and 64.7MB in the end (delta: 22.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,894 INFO L158 Benchmark]: TraceAbstraction took 78937.32ms. Allocated memory was 123.7MB in the beginning and 522.2MB in the end (delta: 398.5MB). Free memory was 64.0MB in the beginning and 383.4MB in the end (delta: -319.4MB). Peak memory consumption was 297.4MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,894 INFO L158 Benchmark]: Witness Printer took 83.32ms. Allocated memory is still 522.2MB. Free memory was 383.4MB in the beginning and 376.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:43:33,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 622.34ms. Allocated memory is still 123.7MB. Free memory was 83.4MB in the beginning and 91.6MB in the end (delta: -8.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.72ms. Allocated memory is still 123.7MB. Free memory was 91.2MB in the beginning and 88.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.75ms. Allocated memory is still 123.7MB. Free memory was 88.7MB in the beginning and 87.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 723.08ms. Allocated memory is still 123.7MB. Free memory was 87.0MB in the beginning and 64.7MB in the end (delta: 22.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 78937.32ms. Allocated memory was 123.7MB in the beginning and 522.2MB in the end (delta: 398.5MB). Free memory was 64.0MB in the beginning and 383.4MB in the end (delta: -319.4MB). Peak memory consumption was 297.4MB. Max. memory is 16.1GB. * Witness Printer took 83.32ms. Allocated memory is still 522.2MB. Free memory was 383.4MB in the beginning and 376.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 760]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 62 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 78.8s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3874 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3834 mSDsluCounter, 3010 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2762 mSDsCounter, 2410 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5643 IncrementalHoareTripleChecker+Invalid, 8053 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2410 mSolverCounterUnsat, 854 mSDtfsCounter, 5643 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1181 GetRequests, 787 SyntacticMatches, 16 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 35.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=770occurred in iteration=12, InterpolantAutomatonStates: 208, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 13 MinimizatonAttempts, 1013 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 2005 PreInvPairs, 2099 NumberOfFragments, 1267 HoareAnnotationTreeSize, 2005 FomulaSimplifications, 22332 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 38 FomulaSimplificationsInter, 64739 FormulaSimplificationTreeSizeReductionInter, 4.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 1007 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1219 ConstructedInterpolants, 0 QuantifiedInterpolants, 5209 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2275 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 21 InterpolantComputations, 10 PerfectInterpolantSequences, 479/722 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 977]: Loop Invariant Derived loop invariant: ((pumpRunning == 0 && methaneLevelCritical == 0) && 1 == systemActive) && waterLevel == 1 - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 977]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 538]: Loop Invariant Derived loop invariant: (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(2 == waterLevel)) || (pumpRunning == 0 && tmp == 1)) && (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || !(1 == systemActive)) || (pumpRunning == 0 && tmp == 0)) - InvariantResult [Line: 582]: Loop Invariant Derived loop invariant: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || (pumpRunning == 0 && waterLevel == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || ((waterLevel <= \old(waterLevel) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) || !(\old(waterLevel) == 2)) - InvariantResult [Line: 560]: Loop Invariant Derived loop invariant: ((((!(waterLevel == 1) || !(1 == systemActive)) || !(\old(pumpRunning) == 1)) || pumpRunning == 1) && (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || pumpRunning == 0) || !(1 == systemActive))) && (((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 == systemActive)) || !(2 == waterLevel)) - InvariantResult [Line: 760]: Loop Invariant Derived loop invariant: (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) && (((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && ((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) - InvariantResult [Line: 906]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 896]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 586]: Loop Invariant Derived loop invariant: ((((((waterLevel == 1 && pumpRunning == 1) || !(1 == systemActive)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel))) && (((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || (pumpRunning == 0 && 2 == waterLevel)) || !(\old(waterLevel) == 2)) - InvariantResult [Line: 869]: Loop Invariant Derived loop invariant: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) && ((((!(1 == systemActive) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) || (((tmp == waterLevel && waterLevel <= \old(waterLevel)) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) - InvariantResult [Line: 498]: Loop Invariant Derived loop invariant: ((((((pumpRunning == 0 && 1 == systemActive) && \old(waterLevel) == waterLevel) || !(\old(pumpRunning) == 0)) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || (\old(waterLevel) == waterLevel && pumpRunning == 1)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || ((pumpRunning == 0 && 1 == systemActive) && waterLevel == 1)) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) - InvariantResult [Line: 430]: Loop Invariant Derived loop invariant: (((pumpRunning == 0 && 1 == systemActive) && splverifierCounter == 0) && waterLevel == 1) || (((2 == waterLevel && 1 == systemActive) && splverifierCounter == 0) && pumpRunning == 1) - InvariantResult [Line: 429]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 877]: Loop Invariant Derived loop invariant: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) && ((((!(1 == systemActive) || ((pumpRunning == 0 && tmp == waterLevel) && waterLevel == 1)) || !(\old(pumpRunning) == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || !(\old(waterLevel) == 2)) || (((tmp == waterLevel && waterLevel <= \old(waterLevel)) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) - InvariantResult [Line: 534]: Loop Invariant Derived loop invariant: (((!(waterLevel == 1) || !(\old(pumpRunning) == 0)) || pumpRunning == 0) || !(1 == systemActive)) && (((!(\old(pumpRunning) == 0) || pumpRunning == 0) || !(1 == systemActive)) || !(2 == waterLevel)) - InvariantResult [Line: 509]: Loop Invariant Derived loop invariant: ((((!(\old(pumpRunning) == 0) || !(\old(waterLevel) == 1)) || !(1 == systemActive)) || (pumpRunning == 0 && waterLevel == 1)) && ((((!(1 == systemActive) || !(\old(pumpRunning) == 1)) || (pumpRunning == 0 && waterLevel == 1)) || !(\old(waterLevel) <= 2)) || !(2 <= \old(waterLevel)))) && (((!(\old(pumpRunning) == 0) || !(1 == systemActive)) || ((waterLevel <= \old(waterLevel) && \old(waterLevel) <= waterLevel) && pumpRunning == 1)) || !(\old(waterLevel) == 2)) - InvariantResult [Line: 420]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-23 02:43:33,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710214ba-5112-4f10-9c97-0c082466f004/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE