./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI --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 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:16:49,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:16:49,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:16:49,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:16:49,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:16:49,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:16:49,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:16:49,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:16:49,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:16:49,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:16:49,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:16:49,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:16:49,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:16:49,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:16:49,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:16:49,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:16:49,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:16:49,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:16:49,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:16:49,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:16:49,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:16:49,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:16:49,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:16:49,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:16:49,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:16:49,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:16:49,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:16:49,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:16:49,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:16:49,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:16:49,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:16:49,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:16:49,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:16:49,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:16:49,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:16:49,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:16:49,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:16:49,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:16:49,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:16:49,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:16:49,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:16:49,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:16:49,265 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:16:49,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:16:49,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:16:49,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:16:49,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:16:49,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:16:49,269 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:16:49,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:16:49,269 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:16:49,270 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:16:49,271 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:16:49,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:16:49,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:16:49,271 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:16:49,272 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:16:49,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:16:49,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:16:49,272 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:16:49,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:16:49,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:16:49,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:16:49,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:16:49,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:16:49,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:16:49,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:16:49,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:16:49,283 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:16:49,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:16:49,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:16:49,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:16:49,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:16:49,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:16:49,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:49,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:16:49,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:16:49,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:16:49,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:16:49,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:16:49,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:16:49,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:16:49,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:16:49,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f [2022-11-03 02:16:49,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:16:49,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:16:49,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:16:49,566 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:16:49,567 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:16:49,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2022-11-03 02:16:49,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/data/f81b3e2d3/8c207c6c48834a49953b85017be447f5/FLAG872f34492 [2022-11-03 02:16:50,135 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:16:50,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2022-11-03 02:16:50,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/data/f81b3e2d3/8c207c6c48834a49953b85017be447f5/FLAG872f34492 [2022-11-03 02:16:50,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/data/f81b3e2d3/8c207c6c48834a49953b85017be447f5 [2022-11-03 02:16:50,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:16:50,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:16:50,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:50,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:16:50,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:16:50,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:50" (1/1) ... [2022-11-03 02:16:50,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79c5c275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:50, skipping insertion in model container [2022-11-03 02:16:50,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:50" (1/1) ... [2022-11-03 02:16:50,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:16:50,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:16:50,840 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_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2022-11-03 02:16:50,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:50,887 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:16:50,974 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_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2022-11-03 02:16:51,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:51,030 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:16:51,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51 WrapperNode [2022-11-03 02:16:51,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:51,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:51,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:16:51,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:16:51,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,085 INFO L138 Inliner]: procedures = 58, calls = 159, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 286 [2022-11-03 02:16:51,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:51,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:16:51,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:16:51,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:16:51,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:16:51,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:16:51,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:16:51,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:16:51,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (1/1) ... [2022-11-03 02:16:51,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:51,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:16:51,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:16:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:16:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-03 02:16:51,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-03 02:16:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:16:51,216 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:16:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:16:51,216 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:16:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-11-03 02:16:51,216 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-11-03 02:16:51,217 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-03 02:16:51,217 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-03 02:16:51,217 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-03 02:16:51,217 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-03 02:16:51,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:16:51,218 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-03 02:16:51,218 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-03 02:16:51,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:16:51,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:16:51,328 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:16:51,331 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:16:51,656 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:16:51,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:16:51,930 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:16:51,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:51 BoogieIcfgContainer [2022-11-03 02:16:51,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:16:51,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:16:51,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:16:51,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:16:51,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:16:50" (1/3) ... [2022-11-03 02:16:51,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e562ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:51, skipping insertion in model container [2022-11-03 02:16:51,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:51" (2/3) ... [2022-11-03 02:16:51,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e562ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:51, skipping insertion in model container [2022-11-03 02:16:51,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:51" (3/3) ... [2022-11-03 02:16:51,944 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product60.cil.c [2022-11-03 02:16:51,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:16:51,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:16:52,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:16:52,041 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5648173c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:16:52,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:16:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:16:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:16:52,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:52,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:52,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash -37410934, now seen corresponding path program 1 times [2022-11-03 02:16:52,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:52,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267058144] [2022-11-03 02:16:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:52,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:52,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267058144] [2022-11-03 02:16:52,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267058144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:52,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:52,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:16:52,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641002575] [2022-11-03 02:16:52,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:52,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:16:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:16:52,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:16:52,402 INFO L87 Difference]: Start difference. First operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-11-03 02:16:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:52,518 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2022-11-03 02:16:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:16:52,523 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 [2022-11-03 02:16:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:52,532 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:16:52,533 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 02:16:52,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:16:52,542 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:52,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 02:16:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-03 02:16:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:16:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-11-03 02:16:52,603 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 12 [2022-11-03 02:16:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:52,604 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-11-03 02:16:52,605 INFO L496 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) [2022-11-03 02:16:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-11-03 02:16:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:16:52,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:52,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:52,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:16:52,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2092430191, now seen corresponding path program 1 times [2022-11-03 02:16:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:52,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806341385] [2022-11-03 02:16:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:52,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806341385] [2022-11-03 02:16:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806341385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:52,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:52,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:16:52,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910456273] [2022-11-03 02:16:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:52,771 INFO L87 Difference]: Start difference. First operand 54 states and 71 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) [2022-11-03 02:16:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:52,838 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2022-11-03 02:16:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:52,839 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 [2022-11-03 02:16:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:52,841 INFO L225 Difference]: With dead ends: 80 [2022-11-03 02:16:52,841 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 02:16:52,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:52,848 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:52,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:16:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 02:16:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 02:16:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:16:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-03 02:16:52,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 13 [2022-11-03 02:16:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:52,875 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-03 02:16:52,875 INFO L496 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) [2022-11-03 02:16:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-03 02:16:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:16:52,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:52,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:52,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:16:52,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -503628936, now seen corresponding path program 1 times [2022-11-03 02:16:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045757747] [2022-11-03 02:16:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:52,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:53,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045757747] [2022-11-03 02:16:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045757747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:53,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:53,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:53,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366302359] [2022-11-03 02:16:53,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:16:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:16:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:53,059 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-03 02:16:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:53,204 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2022-11-03 02:16:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:16:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16 [2022-11-03 02:16:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:53,208 INFO L225 Difference]: With dead ends: 119 [2022-11-03 02:16:53,208 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:16:53,211 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:16:53,216 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:53,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:16:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-11-03 02:16:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-03 02:16:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-11-03 02:16:53,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 16 [2022-11-03 02:16:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:53,240 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-11-03 02:16:53,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-03 02:16:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-11-03 02:16:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:16:53,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:53,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:53,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:16:53,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2011774462, now seen corresponding path program 1 times [2022-11-03 02:16:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:53,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697324349] [2022-11-03 02:16:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:53,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:53,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697324349] [2022-11-03 02:16:53,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697324349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:53,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:53,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546095104] [2022-11-03 02:16:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:16:53,535 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 02:16:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:53,703 INFO L93 Difference]: Finished difference Result 239 states and 319 transitions. [2022-11-03 02:16:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:16:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 19 [2022-11-03 02:16:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:53,706 INFO L225 Difference]: With dead ends: 239 [2022-11-03 02:16:53,706 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:16:53,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:16:53,708 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 70 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:53,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 194 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:16:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 142. [2022-11-03 02:16:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 100 states have (on average 1.33) internal successors, (133), 115 states have internal predecessors, (133), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (26), 19 states have call predecessors, (26), 21 states have call successors, (26) [2022-11-03 02:16:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2022-11-03 02:16:53,747 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 19 [2022-11-03 02:16:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:53,747 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2022-11-03 02:16:53,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 02:16:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2022-11-03 02:16:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:16:53,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:53,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:53,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:16:53,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:53,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1302872931, now seen corresponding path program 1 times [2022-11-03 02:16:53,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:53,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162972286] [2022-11-03 02:16:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:54,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162972286] [2022-11-03 02:16:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162972286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:54,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:16:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38793705] [2022-11-03 02:16:54,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:54,113 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:16:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:54,635 INFO L93 Difference]: Finished difference Result 339 states and 450 transitions. [2022-11-03 02:16:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:16:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2022-11-03 02:16:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:54,643 INFO L225 Difference]: With dead ends: 339 [2022-11-03 02:16:54,643 INFO L226 Difference]: Without dead ends: 269 [2022-11-03 02:16:54,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:16:54,647 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 233 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:54,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 253 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:16:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-03 02:16:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 236. [2022-11-03 02:16:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 165 states have (on average 1.3151515151515152) internal successors, (217), 190 states have internal predecessors, (217), 36 states have call successors, (36), 30 states have call predecessors, (36), 34 states have return successors, (45), 33 states have call predecessors, (45), 36 states have call successors, (45) [2022-11-03 02:16:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 298 transitions. [2022-11-03 02:16:54,691 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 298 transitions. Word has length 22 [2022-11-03 02:16:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:54,691 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 298 transitions. [2022-11-03 02:16:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:16:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 298 transitions. [2022-11-03 02:16:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:16:54,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:54,694 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:16:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:16:54,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash 870628612, now seen corresponding path program 1 times [2022-11-03 02:16:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939196179] [2022-11-03 02:16:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:54,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939196179] [2022-11-03 02:16:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939196179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:54,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:54,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111580009] [2022-11-03 02:16:54,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:54,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:16:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:16:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:54,749 INFO L87 Difference]: Start difference. First operand 236 states and 298 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:16:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:54,876 INFO L93 Difference]: Finished difference Result 481 states and 605 transitions. [2022-11-03 02:16:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:16:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-03 02:16:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:54,879 INFO L225 Difference]: With dead ends: 481 [2022-11-03 02:16:54,879 INFO L226 Difference]: Without dead ends: 247 [2022-11-03 02:16:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:54,881 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 82 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 108 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-03 02:16:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2022-11-03 02:16:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 156 states have (on average 1.2884615384615385) internal successors, (201), 178 states have internal predecessors, (201), 32 states have call successors, (32), 29 states have call predecessors, (32), 33 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-03 02:16:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 269 transitions. [2022-11-03 02:16:54,912 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 269 transitions. Word has length 44 [2022-11-03 02:16:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:54,913 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 269 transitions. [2022-11-03 02:16:54,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:16:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 269 transitions. [2022-11-03 02:16:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:16:54,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:54,915 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:16:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:16:54,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash 933952714, now seen corresponding path program 1 times [2022-11-03 02:16:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:54,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083523524] [2022-11-03 02:16:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:55,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:55,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083523524] [2022-11-03 02:16:55,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083523524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:55,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209397121] [2022-11-03 02:16:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:55,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:55,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:16:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:16:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:55,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:56,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209397121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:56,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475724868] [2022-11-03 02:16:56,034 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-03 02:16:56,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:16:56,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:16:56,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:16:56,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:05,807 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2022-11-03 02:17:05,921 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 27 for LOIs [2022-11-03 02:17:05,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:17:15,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3718#(and (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (<= 0 |#NULL.base|) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4))' at error location [2022-11-03 02:17:15,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:15,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:15,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2022-11-03 02:17:15,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350837332] [2022-11-03 02:17:15,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:17:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:17:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:17:15,713 INFO L87 Difference]: Start difference. First operand 222 states and 269 transitions. Second operand has 21 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 02:17:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:25,826 INFO L93 Difference]: Finished difference Result 2640 states and 3730 transitions. [2022-11-03 02:17:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-03 02:17:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-03 02:17:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:25,846 INFO L225 Difference]: With dead ends: 2640 [2022-11-03 02:17:25,846 INFO L226 Difference]: Without dead ends: 2490 [2022-11-03 02:17:25,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21813 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=5653, Invalid=45197, Unknown=0, NotChecked=0, Total=50850 [2022-11-03 02:17:25,865 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 2420 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 3889 mSolverCounterSat, 2566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 6455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2566 IncrementalHoareTripleChecker+Valid, 3889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:25,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2434 Valid, 1345 Invalid, 6455 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2566 Valid, 3889 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:17:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-11-03 02:17:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1715. [2022-11-03 02:17:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1262 states have (on average 1.3003169572107764) internal successors, (1641), 1361 states have internal predecessors, (1641), 211 states have call successors, (211), 199 states have call predecessors, (211), 241 states have return successors, (290), 232 states have call predecessors, (290), 211 states have call successors, (290) [2022-11-03 02:17:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2142 transitions. [2022-11-03 02:17:26,126 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2142 transitions. Word has length 41 [2022-11-03 02:17:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:26,127 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2142 transitions. [2022-11-03 02:17:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 02:17:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2142 transitions. [2022-11-03 02:17:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:17:26,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:26,133 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:17:26,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:26,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:17:26,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1625036378, now seen corresponding path program 1 times [2022-11-03 02:17:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:26,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410833602] [2022-11-03 02:17:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:26,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410833602] [2022-11-03 02:17:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410833602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:26,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:17:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515066222] [2022-11-03 02:17:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:26,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:17:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:17:26,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:17:26,676 INFO L87 Difference]: Start difference. First operand 1715 states and 2142 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:17:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:27,220 INFO L93 Difference]: Finished difference Result 2706 states and 3425 transitions. [2022-11-03 02:17:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-11-03 02:17:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:27,228 INFO L225 Difference]: With dead ends: 2706 [2022-11-03 02:17:27,229 INFO L226 Difference]: Without dead ends: 1611 [2022-11-03 02:17:27,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:17:27,232 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 197 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:27,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 178 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:17:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-11-03 02:17:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1451. [2022-11-03 02:17:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1071 states have (on average 1.3034547152194211) internal successors, (1396), 1157 states have internal predecessors, (1396), 178 states have call successors, (178), 156 states have call predecessors, (178), 201 states have return successors, (271), 193 states have call predecessors, (271), 178 states have call successors, (271) [2022-11-03 02:17:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1845 transitions. [2022-11-03 02:17:27,382 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1845 transitions. Word has length 44 [2022-11-03 02:17:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:27,383 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1845 transitions. [2022-11-03 02:17:27,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:17:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1845 transitions. [2022-11-03 02:17:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:17:27,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:27,387 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:17:27,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:17:27,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2035928039, now seen corresponding path program 1 times [2022-11-03 02:17:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:27,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826164687] [2022-11-03 02:17:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:27,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:28,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826164687] [2022-11-03 02:17:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826164687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320134382] [2022-11-03 02:17:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:28,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:28,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:17:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:17:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:17:28,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320134382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304188926] [2022-11-03 02:17:28,975 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:17:28,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:28,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:28,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:28,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:42,242 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 329 for LOIs [2022-11-03 02:17:42,486 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 45 for LOIs [2022-11-03 02:17:42,761 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-11-03 02:17:42,782 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 30 for LOIs [2022-11-03 02:17:42,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:17:57,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17580#(and (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (<= ~methaneLevelCritical~0 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:17:57,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:57,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:57,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 35 [2022-11-03 02:17:57,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081043732] [2022-11-03 02:17:57,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:57,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:17:57,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:57,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:17:57,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=3394, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:17:57,129 INFO L87 Difference]: Start difference. First operand 1451 states and 1845 transitions. Second operand has 35 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-03 02:18:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:12,076 INFO L93 Difference]: Finished difference Result 9779 states and 13518 transitions. [2022-11-03 02:18:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-03 02:18:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 47 [2022-11-03 02:18:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:12,123 INFO L225 Difference]: With dead ends: 9779 [2022-11-03 02:18:12,123 INFO L226 Difference]: Without dead ends: 8636 [2022-11-03 02:18:12,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21865 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=6008, Invalid=49452, Unknown=0, NotChecked=0, Total=55460 [2022-11-03 02:18:12,137 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2342 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 4983 mSolverCounterSat, 2101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2101 IncrementalHoareTripleChecker+Valid, 4983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:12,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2352 Valid, 1659 Invalid, 7084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2101 Valid, 4983 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:18:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2022-11-03 02:18:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 6572. [2022-11-03 02:18:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 4890 states have (on average 1.2918200408997955) internal successors, (6317), 5222 states have internal predecessors, (6317), 818 states have call successors, (818), 697 states have call predecessors, (818), 863 states have return successors, (1337), 846 states have call predecessors, (1337), 818 states have call successors, (1337) [2022-11-03 02:18:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 8472 transitions. [2022-11-03 02:18:13,093 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 8472 transitions. Word has length 47 [2022-11-03 02:18:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:13,093 INFO L495 AbstractCegarLoop]: Abstraction has 6572 states and 8472 transitions. [2022-11-03 02:18:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-03 02:18:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 8472 transitions. [2022-11-03 02:18:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:18:13,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:13,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:18:13,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:18:13,324 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1708179587, now seen corresponding path program 1 times [2022-11-03 02:18:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:13,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106119616] [2022-11-03 02:18:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:18:14,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106119616] [2022-11-03 02:18:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106119616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852867970] [2022-11-03 02:18:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:14,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:14,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:14,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:14,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:18:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:18:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:18:14,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:18:14,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852867970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092202765] [2022-11-03 02:18:14,851 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-03 02:18:14,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:14,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:14,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:14,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:19,064 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 29 for LOIs [2022-11-03 02:18:19,068 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2022-11-03 02:18:19,337 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 27 for LOIs [2022-11-03 02:18:19,396 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 32 for LOIs [2022-11-03 02:18:19,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:25,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43789#(and (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (<= 0 |#NULL.base|) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4))' at error location [2022-11-03 02:18:25,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:25,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:25,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 26 [2022-11-03 02:18:25,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561867433] [2022-11-03 02:18:25,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:18:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:18:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:18:25,427 INFO L87 Difference]: Start difference. First operand 6572 states and 8472 transitions. Second operand has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 9 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:18:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:33,063 INFO L93 Difference]: Finished difference Result 16032 states and 22045 transitions. [2022-11-03 02:18:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-03 02:18:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 9 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 64 [2022-11-03 02:18:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:33,129 INFO L225 Difference]: With dead ends: 16032 [2022-11-03 02:18:33,129 INFO L226 Difference]: Without dead ends: 12039 [2022-11-03 02:18:33,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 204 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9412 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2343, Invalid=21837, Unknown=0, NotChecked=0, Total=24180 [2022-11-03 02:18:33,152 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1582 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:33,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 1062 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:18:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12039 states. [2022-11-03 02:18:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12039 to 9096. [2022-11-03 02:18:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9096 states, 6742 states have (on average 1.2757342035004449) internal successors, (8601), 7210 states have internal predecessors, (8601), 1157 states have call successors, (1157), 983 states have call predecessors, (1157), 1196 states have return successors, (1692), 1172 states have call predecessors, (1692), 1157 states have call successors, (1692) [2022-11-03 02:18:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9096 states to 9096 states and 11450 transitions. [2022-11-03 02:18:34,740 INFO L78 Accepts]: Start accepts. Automaton has 9096 states and 11450 transitions. Word has length 64 [2022-11-03 02:18:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:34,741 INFO L495 AbstractCegarLoop]: Abstraction has 9096 states and 11450 transitions. [2022-11-03 02:18:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 9 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:18:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9096 states and 11450 transitions. [2022-11-03 02:18:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:18:34,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:34,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:18:34,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:18:34,979 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1494527973, now seen corresponding path program 1 times [2022-11-03 02:18:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:34,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83900873] [2022-11-03 02:18:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:18:36,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:36,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83900873] [2022-11-03 02:18:36,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83900873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:36,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610950719] [2022-11-03 02:18:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:36,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:36,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:18:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:18:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:18:36,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610950719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:36,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:18:36,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [23] total 26 [2022-11-03 02:18:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111424151] [2022-11-03 02:18:36,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:18:36,436 INFO L87 Difference]: Start difference. First operand 9096 states and 11450 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:18:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:37,561 INFO L93 Difference]: Finished difference Result 11166 states and 14165 transitions. [2022-11-03 02:18:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 02:18:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:37,605 INFO L225 Difference]: With dead ends: 11166 [2022-11-03 02:18:37,605 INFO L226 Difference]: Without dead ends: 9387 [2022-11-03 02:18:37,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:18:37,616 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:37,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 182 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2022-11-03 02:18:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 8984. [2022-11-03 02:18:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 6661 states have (on average 1.2724816093679627) internal successors, (8476), 7101 states have internal predecessors, (8476), 1138 states have call successors, (1138), 980 states have call predecessors, (1138), 1184 states have return successors, (1628), 1167 states have call predecessors, (1628), 1138 states have call successors, (1628) [2022-11-03 02:18:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 11242 transitions. [2022-11-03 02:18:38,741 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 11242 transitions. Word has length 73 [2022-11-03 02:18:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:38,741 INFO L495 AbstractCegarLoop]: Abstraction has 8984 states and 11242 transitions. [2022-11-03 02:18:38,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:18:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 11242 transitions. [2022-11-03 02:18:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:18:38,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:38,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:38,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:38,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1449732421, now seen corresponding path program 1 times [2022-11-03 02:18:38,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:38,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31016937] [2022-11-03 02:18:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:18:39,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:39,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31016937] [2022-11-03 02:18:39,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31016937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212910322] [2022-11-03 02:18:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:39,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:39,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:39,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:39,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:18:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:18:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:18:39,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:18:39,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212910322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477282449] [2022-11-03 02:18:39,583 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-03 02:18:39,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:39,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:39,585 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:39,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:50,472 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 330 for LOIs [2022-11-03 02:18:50,648 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2022-11-03 02:18:50,741 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 28 for LOIs [2022-11-03 02:18:50,764 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 41 for LOIs [2022-11-03 02:18:50,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:03,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114680#(and (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (<= ~methaneLevelCritical~0 1) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:03,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:03,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-03 02:19:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000720305] [2022-11-03 02:19:03,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:19:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:19:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:19:03,440 INFO L87 Difference]: Start difference. First operand 8984 states and 11242 transitions. Second operand has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 14 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 02:19:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:07,203 INFO L93 Difference]: Finished difference Result 20716 states and 26444 transitions. [2022-11-03 02:19:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:19:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 14 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 72 [2022-11-03 02:19:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:07,260 INFO L225 Difference]: With dead ends: 20716 [2022-11-03 02:19:07,260 INFO L226 Difference]: Without dead ends: 14516 [2022-11-03 02:19:07,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=767, Invalid=7065, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 02:19:07,278 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 915 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:07,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 518 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:19:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14516 states. [2022-11-03 02:19:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14516 to 11373. [2022-11-03 02:19:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11373 states, 8405 states have (on average 1.2687685901249257) internal successors, (10664), 8991 states have internal predecessors, (10664), 1430 states have call successors, (1430), 1255 states have call predecessors, (1430), 1537 states have return successors, (2024), 1472 states have call predecessors, (2024), 1430 states have call successors, (2024) [2022-11-03 02:19:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 14118 transitions. [2022-11-03 02:19:08,633 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 14118 transitions. Word has length 72 [2022-11-03 02:19:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:08,633 INFO L495 AbstractCegarLoop]: Abstraction has 11373 states and 14118 transitions. [2022-11-03 02:19:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 14 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 02:19:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 14118 transitions. [2022-11-03 02:19:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:19:08,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:08,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:08,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:19:08,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:08,859 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash -625532606, now seen corresponding path program 1 times [2022-11-03 02:19:08,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:08,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713479044] [2022-11-03 02:19:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:19:10,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713479044] [2022-11-03 02:19:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713479044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502091943] [2022-11-03 02:19:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:10,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:10,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:19:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:19:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:19:10,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:19:11,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502091943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560041781] [2022-11-03 02:19:11,621 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2022-11-03 02:19:11,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:11,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:11,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:11,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:18,036 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 309 for LOIs [2022-11-03 02:19:18,094 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2022-11-03 02:19:18,283 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-03 02:19:18,495 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 41 for LOIs [2022-11-03 02:19:18,502 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 37 for LOIs [2022-11-03 02:19:18,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:30,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164918#(and (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (<= ~methaneLevelCritical~0 1) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:30,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:30,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:30,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 16] total 47 [2022-11-03 02:19:30,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132692801] [2022-11-03 02:19:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 02:19:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 02:19:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=5297, Unknown=0, NotChecked=0, Total=5852 [2022-11-03 02:19:30,762 INFO L87 Difference]: Start difference. First operand 11373 states and 14118 transitions. Second operand has 47 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 17 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-03 02:19:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:55,395 INFO L93 Difference]: Finished difference Result 35859 states and 46544 transitions. [2022-11-03 02:19:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-11-03 02:19:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 17 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) Word has length 75 [2022-11-03 02:19:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:55,509 INFO L225 Difference]: With dead ends: 35859 [2022-11-03 02:19:55,509 INFO L226 Difference]: Without dead ends: 27204 [2022-11-03 02:19:55,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 202 SyntacticMatches, 8 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34976 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=7684, Invalid=78458, Unknown=0, NotChecked=0, Total=86142 [2022-11-03 02:19:55,544 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 4841 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 10535 mSolverCounterSat, 3894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4855 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 14429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3894 IncrementalHoareTripleChecker+Valid, 10535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:55,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4855 Valid, 1532 Invalid, 14429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3894 Valid, 10535 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:19:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27204 states. [2022-11-03 02:19:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27204 to 18017. [2022-11-03 02:19:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18017 states, 13265 states have (on average 1.2640784018092726) internal successors, (16768), 14254 states have internal predecessors, (16768), 2299 states have call successors, (2299), 2010 states have call predecessors, (2299), 2452 states have return successors, (3228), 2315 states have call predecessors, (3228), 2299 states have call successors, (3228) [2022-11-03 02:19:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18017 states to 18017 states and 22295 transitions. [2022-11-03 02:19:58,193 INFO L78 Accepts]: Start accepts. Automaton has 18017 states and 22295 transitions. Word has length 75 [2022-11-03 02:19:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:58,194 INFO L495 AbstractCegarLoop]: Abstraction has 18017 states and 22295 transitions. [2022-11-03 02:19:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 17 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-03 02:19:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 18017 states and 22295 transitions. [2022-11-03 02:19:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:19:58,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:58,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:58,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:58,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:19:58,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1876033185, now seen corresponding path program 1 times [2022-11-03 02:19:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306487352] [2022-11-03 02:19:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:19:59,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306487352] [2022-11-03 02:19:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306487352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991544725] [2022-11-03 02:19:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:59,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:59,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:59,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:59,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:19:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:19:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:19:59,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:19:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991544725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:59,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:19:59,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-03 02:19:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563208682] [2022-11-03 02:19:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:59,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:19:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:59,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:19:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:19:59,394 INFO L87 Difference]: Start difference. First operand 18017 states and 22295 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:20:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:01,906 INFO L93 Difference]: Finished difference Result 28739 states and 35783 transitions. [2022-11-03 02:20:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:20:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 77 [2022-11-03 02:20:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:01,967 INFO L225 Difference]: With dead ends: 28739 [2022-11-03 02:20:01,968 INFO L226 Difference]: Without dead ends: 16177 [2022-11-03 02:20:02,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:20:02,001 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 72 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:02,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 251 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16177 states. [2022-11-03 02:20:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16177 to 15583. [2022-11-03 02:20:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 11538 states have (on average 1.2620904836193447) internal successors, (14562), 12347 states have internal predecessors, (14562), 1969 states have call successors, (1969), 1752 states have call predecessors, (1969), 2075 states have return successors, (2676), 1977 states have call predecessors, (2676), 1969 states have call successors, (2676) [2022-11-03 02:20:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 19207 transitions. [2022-11-03 02:20:04,068 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 19207 transitions. Word has length 77 [2022-11-03 02:20:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:04,069 INFO L495 AbstractCegarLoop]: Abstraction has 15583 states and 19207 transitions. [2022-11-03 02:20:04,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:20:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 19207 transitions. [2022-11-03 02:20:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:20:04,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:04,087 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:20:04,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:20:04,315 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash 121198200, now seen corresponding path program 1 times [2022-11-03 02:20:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067097208] [2022-11-03 02:20:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:04,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:20:05,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:05,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067097208] [2022-11-03 02:20:05,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067097208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:05,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935720516] [2022-11-03 02:20:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:05,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:05,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:05,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:05,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:20:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:20:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:20:06,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:20:06,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935720516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797773760] [2022-11-03 02:20:06,880 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-03 02:20:06,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:06,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:06,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:06,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:14,194 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 305 for LOIs [2022-11-03 02:20:14,251 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-03 02:20:14,522 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-03 02:20:14,687 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 33 for LOIs [2022-11-03 02:20:14,689 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 29 for LOIs [2022-11-03 02:20:14,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:20:26,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '317652#(and (<= ~cleanupTimeShifts~0 4) (<= ~head~0.offset 0) (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (<= 0 |#NULL.base|) (<= 0 ~head~0.offset) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (<= 1 ~systemActive~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (<= 4 ~cleanupTimeShifts~0) (<= ~methaneLevelCritical~0 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1))' at error location [2022-11-03 02:20:26,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:20:26,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:20:26,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 41 [2022-11-03 02:20:26,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572125399] [2022-11-03 02:20:26,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:20:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:20:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=4156, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:20:26,973 INFO L87 Difference]: Start difference. First operand 15583 states and 19207 transitions. Second operand has 41 states, 38 states have (on average 4.184210526315789) internal successors, (159), 39 states have internal predecessors, (159), 19 states have call successors, (24), 8 states have call predecessors, (24), 16 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) [2022-11-03 02:20:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:31,575 INFO L93 Difference]: Finished difference Result 22520 states and 28052 transitions. [2022-11-03 02:20:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 02:20:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 4.184210526315789) internal successors, (159), 39 states have internal predecessors, (159), 19 states have call successors, (24), 8 states have call predecessors, (24), 16 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) Word has length 94 [2022-11-03 02:20:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:31,581 INFO L225 Difference]: With dead ends: 22520 [2022-11-03 02:20:31,581 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:20:31,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 235 SyntacticMatches, 12 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5474 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1763, Invalid=11577, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:20:31,611 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1632 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:31,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 932 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1030 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:20:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:20:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:20:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:20:31,615 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-11-03 02:20:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:31,616 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:20:31,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 4.184210526315789) internal successors, (159), 39 states have internal predecessors, (159), 19 states have call successors, (24), 8 states have call predecessors, (24), 16 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) [2022-11-03 02:20:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:20:31,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:20:31,619 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:20:31,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:31,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7d5ee1-d9c2-45b6-8162-fce29afe8126/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:31,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 02:20:45,520 WARN L234 SmtUtils]: Spent 13.63s on a formula simplification. DAG size of input: 1376 DAG size of output: 323 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:21:11,328 WARN L234 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:21:25,269 WARN L234 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:21:34,032 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:21:44,909 WARN L234 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:28:52,790 WARN L234 SmtUtils]: Spent 6.82m on a formula simplification. DAG size of input: 582 DAG size of output: 489 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:29:01,345 WARN L234 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 655 DAG size of output: 404 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:29:29,987 WARN L234 SmtUtils]: Spent 28.37s on a formula simplification. DAG size of input: 1159 DAG size of output: 560 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:30:55,807 WARN L234 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 688 DAG size of output: 428 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)