./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 190527f0b5c755657048457e241e1db06174c0bd15c9c37dddb3c55b0e7d73ce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:19:03,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:19:03,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:19:03,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:19:03,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:19:03,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:19:03,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:19:03,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:19:03,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:19:03,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:19:03,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:19:03,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:19:03,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:19:03,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:19:03,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:19:03,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:19:03,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:19:03,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:19:03,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:19:03,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:19:03,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:19:03,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:19:03,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:19:03,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:19:03,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:19:03,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:19:03,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:19:03,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:19:03,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:19:03,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:19:03,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:19:03,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:19:03,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:19:03,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:19:03,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:19:03,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:19:03,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:19:03,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:19:03,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:19:03,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:19:03,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:19:03,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:19:03,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:19:03,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:19:03,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:19:03,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:19:03,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:19:03,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:19:03,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:19:03,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:19:03,450 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:19:03,450 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:19:03,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:19:03,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:19:03,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:19:03,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:19:03,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:19:03,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:19:03,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:19:03,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:19:03,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:19:03,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:19:03,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:19:03,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:19:03,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:19:03,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:19:03,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:19:03,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:19:03,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:19:03,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:19:03,459 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:19:03,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:19:03,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:19:03,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:19:03,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:19:03,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:19:03,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:19:03,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:19:03,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:19:03,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:19:03,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:19:03,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:19:03,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:19:03,464 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_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 190527f0b5c755657048457e241e1db06174c0bd15c9c37dddb3c55b0e7d73ce [2022-11-19 08:19:03,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:19:03,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:19:03,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:19:03,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:19:03,806 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:19:03,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c [2022-11-19 08:19:03,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/data/c7ac01e6a/ad4a3e86764344feb2381f3267f69d68/FLAGad276b807 [2022-11-19 08:19:04,461 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:19:04,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c [2022-11-19 08:19:04,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/data/c7ac01e6a/ad4a3e86764344feb2381f3267f69d68/FLAGad276b807 [2022-11-19 08:19:04,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/data/c7ac01e6a/ad4a3e86764344feb2381f3267f69d68 [2022-11-19 08:19:04,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:19:04,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:19:04,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:19:04,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:19:04,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:19:04,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5222fb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04, skipping insertion in model container [2022-11-19 08:19:04,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:19:04,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:19:05,286 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c[17943,17956] [2022-11-19 08:19:05,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:19:05,302 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:19:05,361 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c[17943,17956] [2022-11-19 08:19:05,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:19:05,379 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:19:05,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05 WrapperNode [2022-11-19 08:19:05,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:19:05,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:19:05,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:19:05,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:19:05,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,462 INFO L138 Inliner]: procedures = 54, calls = 96, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 193 [2022-11-19 08:19:05,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:19:05,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:19:05,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:19:05,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:19:05,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:19:05,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:19:05,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:19:05,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:19:05,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (1/1) ... [2022-11-19 08:19:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:19:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:05,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:19:05,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:19:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:19:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-19 08:19:05,634 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-19 08:19:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:19:05,635 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:19:05,635 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:19:05,635 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:19:05,635 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 08:19:05,635 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 08:19:05,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:19:05,636 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 08:19:05,636 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 08:19:05,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:19:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:19:05,772 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:19:05,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:19:06,115 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:19:06,313 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:19:06,313 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:19:06,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:19:06 BoogieIcfgContainer [2022-11-19 08:19:06,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:19:06,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:19:06,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:19:06,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:19:06,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:19:04" (1/3) ... [2022-11-19 08:19:06,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2eacf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:19:06, skipping insertion in model container [2022-11-19 08:19:06,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:05" (2/3) ... [2022-11-19 08:19:06,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2eacf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:19:06, skipping insertion in model container [2022-11-19 08:19:06,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:19:06" (3/3) ... [2022-11-19 08:19:06,331 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product42.cil.c [2022-11-19 08:19:06,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:19:06,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:19:06,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:19:06,466 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;@80c6a85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:19:06,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:19:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:19:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:19:06,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:06,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:06,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -128954924, now seen corresponding path program 1 times [2022-11-19 08:19:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842122730] [2022-11-19 08:19:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:06,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842122730] [2022-11-19 08:19:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842122730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:06,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:19:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376385907] [2022-11-19 08:19:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:06,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:19:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:19:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:19:06,819 INFO L87 Difference]: Start difference. First operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:06,890 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-11-19 08:19:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:19:06,893 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 [2022-11-19 08:19:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:06,903 INFO L225 Difference]: With dead ends: 86 [2022-11-19 08:19:06,903 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 08:19:06,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:19:06,911 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:06,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:19:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 08:19:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-19 08:19:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:19:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-19 08:19:06,978 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2022-11-19 08:19:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:06,979 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-19 08:19:06,980 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) [2022-11-19 08:19:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-19 08:19:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:19:06,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:06,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:19:06,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:06,986 INFO L85 PathProgramCache]: Analyzing trace with hash 343981551, now seen corresponding path program 1 times [2022-11-19 08:19:06,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:06,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452871289] [2022-11-19 08:19:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:06,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:07,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:07,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452871289] [2022-11-19 08:19:07,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452871289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:07,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:07,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:19:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949453109] [2022-11-19 08:19:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:07,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:19:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:19:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:19:07,145 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:07,229 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-11-19 08:19:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:19:07,232 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 [2022-11-19 08:19:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:07,235 INFO L225 Difference]: With dead ends: 55 [2022-11-19 08:19:07,235 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:19:07,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:19:07,237 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:07,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:19:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:19:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 08:19:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:19:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-19 08:19:07,260 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2022-11-19 08:19:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:07,261 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-19 08:19:07,261 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) [2022-11-19 08:19:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-19 08:19:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:19:07,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:07,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:19:07,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1204722222, now seen corresponding path program 1 times [2022-11-19 08:19:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:07,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011559813] [2022-11-19 08:19:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:07,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:07,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011559813] [2022-11-19 08:19:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011559813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:07,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:07,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:19:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592768669] [2022-11-19 08:19:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:19:07,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:19:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:19:07,617 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:07,716 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2022-11-19 08:19:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:19:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:19:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:07,718 INFO L225 Difference]: With dead ends: 60 [2022-11-19 08:19:07,718 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:19:07,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:19:07,721 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:19:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:19:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 08:19:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 26 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:19:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-19 08:19:07,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2022-11-19 08:19:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:07,730 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-19 08:19:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-19 08:19:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:19:07,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:07,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:07,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:19:07,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 617201213, now seen corresponding path program 1 times [2022-11-19 08:19:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:07,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459458138] [2022-11-19 08:19:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:07,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:08,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459458138] [2022-11-19 08:19:08,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459458138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:08,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:08,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:19:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964823521] [2022-11-19 08:19:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:19:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:19:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:19:08,132 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:08,367 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2022-11-19 08:19:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:19:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:19:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:08,374 INFO L225 Difference]: With dead ends: 106 [2022-11-19 08:19:08,374 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 08:19:08,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:19:08,377 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:08,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:19:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 08:19:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-11-19 08:19:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 50 states have internal predecessors, (51), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-19 08:19:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-11-19 08:19:08,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 18 [2022-11-19 08:19:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:08,411 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-11-19 08:19:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-11-19 08:19:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:19:08,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:08,414 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] [2022-11-19 08:19:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:19:08,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 3414419, now seen corresponding path program 1 times [2022-11-19 08:19:08,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:08,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574746953] [2022-11-19 08:19:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:08,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574746953] [2022-11-19 08:19:08,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574746953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:08,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787895477] [2022-11-19 08:19:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:08,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:08,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:08,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:19:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:08,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:19:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:19:09,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:19:09,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787895477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330418734] [2022-11-19 08:19:09,687 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 08:19:09,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:09,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:09,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:09,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:13,057 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-19 08:19:13,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:15,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1330418734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:15,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:15,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 6, 6] total 26 [2022-11-19 08:19:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062164218] [2022-11-19 08:19:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:15,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:19:15,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:19:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:19:15,909 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:19:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:18,952 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-11-19 08:19:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:19:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-19 08:19:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:18,954 INFO L225 Difference]: With dead ends: 120 [2022-11-19 08:19:18,954 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 08:19:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:19:18,956 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 166 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:19:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 08:19:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-11-19 08:19:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 65 states have internal predecessors, (68), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-11-19 08:19:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-11-19 08:19:18,980 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 34 [2022-11-19 08:19:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:18,980 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-11-19 08:19:18,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:19:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-11-19 08:19:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:19:18,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:18,982 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] [2022-11-19 08:19:19,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:19,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1622827093, now seen corresponding path program 1 times [2022-11-19 08:19:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:19,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56888123] [2022-11-19 08:19:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:19:19,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56888123] [2022-11-19 08:19:19,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56888123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:19,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373449801] [2022-11-19 08:19:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:19,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:19,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:19:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 08:19:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:20,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373449801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:20,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709709544] [2022-11-19 08:19:20,016 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 08:19:20,016 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:20,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:20,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:20,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:21,916 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2022-11-19 08:19:22,018 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 42 for LOIs [2022-11-19 08:19:22,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:24,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1709709544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:24,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:24,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [10, 7, 6] total 28 [2022-11-19 08:19:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78893094] [2022-11-19 08:19:24,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:19:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:19:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:19:24,292 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:19:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:28,810 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2022-11-19 08:19:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:19:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-19 08:19:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:28,813 INFO L225 Difference]: With dead ends: 196 [2022-11-19 08:19:28,813 INFO L226 Difference]: Without dead ends: 167 [2022-11-19 08:19:28,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=286, Invalid=1694, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:19:28,816 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:28,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 166 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:19:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-19 08:19:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2022-11-19 08:19:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 114 states have internal predecessors, (124), 18 states have call successors, (18), 16 states have call predecessors, (18), 19 states have return successors, (21), 17 states have call predecessors, (21), 18 states have call successors, (21) [2022-11-19 08:19:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2022-11-19 08:19:28,863 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 37 [2022-11-19 08:19:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:28,863 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2022-11-19 08:19:28,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:19:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2022-11-19 08:19:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:19:28,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:28,866 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] [2022-11-19 08:19:28,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:29,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:29,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1618159681, now seen corresponding path program 1 times [2022-11-19 08:19:29,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:29,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946615937] [2022-11-19 08:19:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:29,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:29,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946615937] [2022-11-19 08:19:29,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946615937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252465450] [2022-11-19 08:19:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:29,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:29,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:29,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:19:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:19:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:29,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:19:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252465450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016428102] [2022-11-19 08:19:29,972 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 08:19:29,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:29,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:29,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:29,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:33,058 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 47 for LOIs [2022-11-19 08:19:33,066 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 51 for LOIs [2022-11-19 08:19:33,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:36,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1016428102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:36,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:36,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 10, 9] total 38 [2022-11-19 08:19:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624544762] [2022-11-19 08:19:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:19:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:19:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:19:36,420 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:19:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:42,276 INFO L93 Difference]: Finished difference Result 277 states and 341 transitions. [2022-11-19 08:19:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:19:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-19 08:19:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:42,280 INFO L225 Difference]: With dead ends: 277 [2022-11-19 08:19:42,280 INFO L226 Difference]: Without dead ends: 248 [2022-11-19 08:19:42,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=643, Invalid=2663, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 08:19:42,283 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 135 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:42,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 292 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:19:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-19 08:19:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2022-11-19 08:19:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 173 states have internal predecessors, (190), 27 states have call successors, (27), 23 states have call predecessors, (27), 29 states have return successors, (35), 26 states have call predecessors, (35), 27 states have call successors, (35) [2022-11-19 08:19:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2022-11-19 08:19:42,355 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 37 [2022-11-19 08:19:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:42,356 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2022-11-19 08:19:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:19:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2022-11-19 08:19:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:19:42,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:42,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:42,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:42,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1529281237, now seen corresponding path program 1 times [2022-11-19 08:19:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:42,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682828584] [2022-11-19 08:19:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:42,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:42,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682828584] [2022-11-19 08:19:42,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682828584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:42,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445488675] [2022-11-19 08:19:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:42,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:42,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:42,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:42,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:19:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:19:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:43,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445488675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693885699] [2022-11-19 08:19:43,268 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:19:43,269 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:43,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:43,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:43,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:44,836 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2022-11-19 08:19:44,943 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2022-11-19 08:19:44,950 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2022-11-19 08:19:44,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:47,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3584#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= ~methaneLevelCritical~0 1) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:19:47,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:47,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:47,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 18 [2022-11-19 08:19:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399978801] [2022-11-19 08:19:47,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:19:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:19:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:19:47,089 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand has 18 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 08:19:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:47,756 INFO L93 Difference]: Finished difference Result 515 states and 633 transitions. [2022-11-19 08:19:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:19:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-11-19 08:19:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:47,760 INFO L225 Difference]: With dead ends: 515 [2022-11-19 08:19:47,760 INFO L226 Difference]: Without dead ends: 434 [2022-11-19 08:19:47,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:19:47,763 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 430 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:47,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 108 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:19:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-19 08:19:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2022-11-19 08:19:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 309 states have (on average 1.2297734627831716) internal successors, (380), 341 states have internal predecessors, (380), 56 states have call successors, (56), 50 states have call predecessors, (56), 58 states have return successors, (75), 55 states have call predecessors, (75), 56 states have call successors, (75) [2022-11-19 08:19:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 511 transitions. [2022-11-19 08:19:47,898 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 511 transitions. Word has length 39 [2022-11-19 08:19:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:47,901 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 511 transitions. [2022-11-19 08:19:47,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 08:19:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 511 transitions. [2022-11-19 08:19:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:19:47,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:47,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:47,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:48,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2028685845, now seen corresponding path program 1 times [2022-11-19 08:19:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45527717] [2022-11-19 08:19:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:48,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:48,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:48,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45527717] [2022-11-19 08:19:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45527717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198575976] [2022-11-19 08:19:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:48,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:48,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:48,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:19:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:48,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:19:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:19:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:19:49,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198575976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640700229] [2022-11-19 08:19:49,494 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:19:49,494 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:49,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:49,495 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:49,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:52,471 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 28 for LOIs [2022-11-19 08:19:52,475 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-19 08:19:52,571 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2022-11-19 08:19:52,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:54,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5416#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:19:54,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:54,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:54,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 11] total 27 [2022-11-19 08:19:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79639232] [2022-11-19 08:19:54,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:54,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:19:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:19:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:19:54,754 INFO L87 Difference]: Start difference. First operand 424 states and 511 transitions. Second operand has 27 states, 24 states have (on average 3.5) internal successors, (84), 25 states have internal predecessors, (84), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 08:19:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:58,060 INFO L93 Difference]: Finished difference Result 1183 states and 1534 transitions. [2022-11-19 08:19:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 08:19:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.5) internal successors, (84), 25 states have internal predecessors, (84), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 39 [2022-11-19 08:19:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:58,068 INFO L225 Difference]: With dead ends: 1183 [2022-11-19 08:19:58,068 INFO L226 Difference]: Without dead ends: 1007 [2022-11-19 08:19:58,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1044, Invalid=6788, Unknown=0, NotChecked=0, Total=7832 [2022-11-19 08:19:58,072 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 754 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:58,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 578 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:19:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-19 08:19:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 852. [2022-11-19 08:19:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 618 states have (on average 1.2394822006472492) internal successors, (766), 679 states have internal predecessors, (766), 124 states have call successors, (124), 97 states have call predecessors, (124), 109 states have return successors, (175), 115 states have call predecessors, (175), 124 states have call successors, (175) [2022-11-19 08:19:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1065 transitions. [2022-11-19 08:19:58,290 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1065 transitions. Word has length 39 [2022-11-19 08:19:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 1065 transitions. [2022-11-19 08:19:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.5) internal successors, (84), 25 states have internal predecessors, (84), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 08:19:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1065 transitions. [2022-11-19 08:19:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:19:58,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:58,294 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] [2022-11-19 08:19:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:19:58,500 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 263475621, now seen corresponding path program 1 times [2022-11-19 08:19:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520588154] [2022-11-19 08:19:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:58,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:58,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520588154] [2022-11-19 08:19:58,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520588154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:58,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207796658] [2022-11-19 08:19:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:58,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:58,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:58,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:19:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:58,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:19:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:19:59,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:19:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207796658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:59,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545668375] [2022-11-19 08:19:59,261 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:19:59,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:59,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:59,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:59,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:20:02,802 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2022-11-19 08:20:02,982 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 139 for LOIs [2022-11-19 08:20:02,996 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 29 for LOIs [2022-11-19 08:20:02,998 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:20:07,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9094#(and (<= |old(~waterLevel~0)| 2147483647) (<= |timeShift_isHighWaterLevel_#res#1| 1) (<= ~methaneLevelCritical~0 1) (<= 0 |timeShift_isHighWaterLevel_#res#1|) (<= |timeShift_isHighWaterLevel_~tmp~8#1| 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (<= |timeShift_isHighWaterSensorDry_#res#1| 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= |timeShift_isHighWaterLevel_~retValue_acc~11#1| 1) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (<= |timeShift_isHighWaterLevel_~tmp___0~2#1| 1) (<= 0 |timeShift_isHighWaterLevel_~tmp~8#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 |timeShift_isHighWaterSensorDry_#res#1|) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= |timeShift_isHighWaterSensorDry_~retValue_acc~2#1| 1) (<= 0 (+ |old(~waterLevel~0)| 2147483648)) (<= |old(~pumpRunning~0)| 0) (<= 0 |timeShift_processEnvironment_~tmp~6#1|) (<= 0 ~head~0.base) (<= 0 |timeShift_isHighWaterLevel_~retValue_acc~11#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 ~methaneLevelCritical~0) (<= 0 |timeShift_isHighWaterLevel_~tmp___0~2#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |timeShift_isHighWaterSensorDry_~retValue_acc~2#1|) (<= 0 |#NULL.offset|) (<= |timeShift_processEnvironment_~tmp~6#1| 1) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:20:07,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:20:07,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:20:07,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 7] total 19 [2022-11-19 08:20:07,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610040726] [2022-11-19 08:20:07,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:20:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:20:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:20:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:20:07,781 INFO L87 Difference]: Start difference. First operand 852 states and 1065 transitions. Second operand has 19 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 08:20:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:09,379 INFO L93 Difference]: Finished difference Result 1889 states and 2494 transitions. [2022-11-19 08:20:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:20:09,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 40 [2022-11-19 08:20:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:09,386 INFO L225 Difference]: With dead ends: 1889 [2022-11-19 08:20:09,387 INFO L226 Difference]: Without dead ends: 1205 [2022-11-19 08:20:09,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=581, Invalid=3325, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 08:20:09,391 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 414 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:09,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 138 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:20:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-11-19 08:20:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 933. [2022-11-19 08:20:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 671 states have (on average 1.2086438152011922) internal successors, (811), 741 states have internal predecessors, (811), 138 states have call successors, (138), 111 states have call predecessors, (138), 123 states have return successors, (191), 129 states have call predecessors, (191), 138 states have call successors, (191) [2022-11-19 08:20:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1140 transitions. [2022-11-19 08:20:09,671 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1140 transitions. Word has length 40 [2022-11-19 08:20:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:09,671 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1140 transitions. [2022-11-19 08:20:09,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 08:20:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1140 transitions. [2022-11-19 08:20:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 08:20:09,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:09,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:09,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:20:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:20:09,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1166060737, now seen corresponding path program 2 times [2022-11-19 08:20:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698624029] [2022-11-19 08:20:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:20:09,900 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:20:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:20:09,972 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:20:09,972 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:20:09,974 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:20:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:20:09,979 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:09,983 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:20:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:20:10 BoogieIcfgContainer [2022-11-19 08:20:10,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:20:10,083 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:20:10,083 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:20:10,083 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:20:10,084 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:19:06" (3/4) ... [2022-11-19 08:20:10,086 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:20:10,201 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:20:10,202 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:20:10,202 INFO L158 Benchmark]: Toolchain (without parser) took 65443.24ms. Allocated memory was 121.6MB in the beginning and 465.6MB in the end (delta: 343.9MB). Free memory was 82.8MB in the beginning and 189.9MB in the end (delta: -107.1MB). Peak memory consumption was 236.7MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,203 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 99.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:20:10,203 INFO L158 Benchmark]: CACSL2BoogieTranslator took 618.97ms. Allocated memory is still 121.6MB. Free memory was 82.6MB in the beginning and 89.3MB in the end (delta: -6.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,204 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.98ms. Allocated memory is still 121.6MB. Free memory was 89.3MB in the beginning and 87.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,204 INFO L158 Benchmark]: Boogie Preprocessor took 59.08ms. Allocated memory is still 121.6MB. Free memory was 87.1MB in the beginning and 85.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,205 INFO L158 Benchmark]: RCFGBuilder took 792.24ms. Allocated memory is still 121.6MB. Free memory was 85.7MB in the beginning and 61.0MB in the end (delta: 24.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,205 INFO L158 Benchmark]: TraceAbstraction took 63763.11ms. Allocated memory was 121.6MB in the beginning and 465.6MB in the end (delta: 343.9MB). Free memory was 60.0MB in the beginning and 196.3MB in the end (delta: -136.3MB). Peak memory consumption was 209.7MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,206 INFO L158 Benchmark]: Witness Printer took 118.94ms. Allocated memory is still 465.6MB. Free memory was 196.3MB in the beginning and 189.9MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-19 08:20:10,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 99.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 618.97ms. Allocated memory is still 121.6MB. Free memory was 82.6MB in the beginning and 89.3MB in the end (delta: -6.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.98ms. Allocated memory is still 121.6MB. Free memory was 89.3MB in the beginning and 87.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.08ms. Allocated memory is still 121.6MB. Free memory was 87.1MB in the beginning and 85.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 792.24ms. Allocated memory is still 121.6MB. Free memory was 85.7MB in the beginning and 61.0MB in the end (delta: 24.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 63763.11ms. Allocated memory was 121.6MB in the beginning and 465.6MB in the end (delta: 343.9MB). Free memory was 60.0MB in the beginning and 196.3MB in the end (delta: -136.3MB). Peak memory consumption was 209.7MB. Max. memory is 16.1GB. * Witness Printer took 118.94ms. Allocated memory is still 465.6MB. Free memory was 196.3MB in the beginning and 189.9MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 934]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L320] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L58] int methaneLevelCritical = 0; [L752] int pumpRunning = 0; [L57] int waterLevel = 1; [L753] int systemActive = 1; [L583] int cleanupTimeShifts = 4; [L659] int retValue_acc ; [L660] int tmp ; [L664] FCALL select_helpers() [L665] FCALL select_features() [L666] CALL, EXPR valid_product() [L546] int retValue_acc ; [L549] retValue_acc = 1 [L550] return (retValue_acc); [L666] RET, EXPR valid_product() [L666] tmp = valid_product() [L668] COND TRUE \read(tmp) [L670] FCALL setup() [L671] CALL runTest() [L653] CALL test() [L684] int splverifierCounter ; [L685] int tmp ; [L686] int tmp___0 ; [L687] int tmp___1 ; [L688] int tmp___2 ; [L691] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L693] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=1] [L705] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L75] COND TRUE waterLevel < 2 [L76] waterLevel = waterLevel + 1 [L705] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=2] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, waterLevel=2] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND FALSE !(\read(tmp___2)) [L729] tmp___1 = __VERIFIER_nondet_int() [L731] COND TRUE \read(tmp___1) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=2] [L738] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L759] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L791] COND TRUE ! pumpRunning [L793] CALL, EXPR isHighWaterLevel() [L903] int retValue_acc ; [L904] int tmp ; [L905] int tmp___0 ; [L909] CALL, EXPR isHighWaterSensorDry() [L137] int retValue_acc ; [L140] COND FALSE !(waterLevel < 2) [L144] retValue_acc = 0 [L145] return (retValue_acc); [L909] RET, EXPR isHighWaterSensorDry() [L909] tmp = isHighWaterSensorDry() [L911] COND FALSE !(\read(tmp)) [L914] tmp___0 = 1 [L916] retValue_acc = tmp___0 [L917] return (retValue_acc); [L793] RET, EXPR isHighWaterLevel() [L793] tmp = isHighWaterLevel() [L795] COND TRUE \read(tmp) [L797] CALL activatePump() [L822] int tmp ; [L826] CALL, EXPR isMethaneAlarm() [L847] int retValue_acc ; [L851] CALL, EXPR isMethaneLevelCritical() [L96] int retValue_acc ; [L99] retValue_acc = methaneLevelCritical [L100] return (retValue_acc); [L851] RET, EXPR isMethaneLevelCritical() [L851] retValue_acc = isMethaneLevelCritical() [L853] return (retValue_acc); [L826] RET, EXPR isMethaneAlarm() [L826] tmp = isMethaneAlarm() [L828] COND FALSE !(\read(tmp)) [L832] CALL activatePump__wrappee__highWaterSensor() [L816] pumpRunning = 1 [L832] RET activatePump__wrappee__highWaterSensor() [L797] RET activatePump() [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L774] RET __utac_acc__Specification4_spec__1() [L738] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=2] [L693] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=2] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=2] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=2] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND TRUE \read(tmp___2) [L725] CALL startSystem() [L925] systemActive = 1 [L725] RET startSystem() [L738] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L759] COND TRUE \read(pumpRunning) [L761] CALL lowerWaterLevel() [L63] COND TRUE waterLevel > 0 [L64] waterLevel = waterLevel - 1 [L761] RET lowerWaterLevel() [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L791] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L806] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L774] RET __utac_acc__Specification4_spec__1() [L738] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=-2, waterLevel=1] [L693] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=-2, waterLevel=1] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=-2, waterLevel=1] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=-2, waterLevel=1] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND FALSE !(\read(tmp___2)) [L729] tmp___1 = __VERIFIER_nondet_int() [L731] COND TRUE \read(tmp___1) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=0, waterLevel=1] [L738] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L759] COND TRUE \read(pumpRunning) [L761] CALL lowerWaterLevel() [L63] COND TRUE waterLevel > 0 [L64] waterLevel = waterLevel - 1 [L761] RET lowerWaterLevel() [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L791] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L806] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND TRUE tmp == 0 [L567] CALL, EXPR isPumpRunning() [L858] int retValue_acc ; [L861] retValue_acc = pumpRunning [L862] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___0 = isPumpRunning() [L569] COND TRUE \read(tmp___0) [L571] CALL __automaton_fail() [L934] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.6s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 19.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1966 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1944 mSDsluCounter, 1673 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1358 mSDsCounter, 1143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3776 IncrementalHoareTripleChecker+Invalid, 4919 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1143 mSolverCounterUnsat, 315 mSDtfsCounter, 3776 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 878 GetRequests, 526 SyntacticMatches, 22 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 32.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=933occurred in iteration=10, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 10 MinimizatonAttempts, 522 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 567 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 714 ConstructedInterpolants, 0 QuantifiedInterpolants, 3449 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1499 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 112/246 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 8.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 79, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 131, TOOLS_POST_TIME: 3.0s, TOOLS_POST_CALL_APPLICATIONS: 37, TOOLS_POST_CALL_TIME: 3.0s, TOOLS_POST_RETURN_APPLICATIONS: 32, TOOLS_POST_RETURN_TIME: 1.9s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 200, TOOLS_QUANTIFIERELIM_TIME: 7.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 263, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 34, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 79, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 5.8s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 5.8s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 32, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 814, DAG_COMPRESSION_RETAINED_NODES: 226, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:20:10,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf290835-0a4e-4ad5-afa5-db900b865562/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE