./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta --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 7573d0f26b9c64760f56bc1038037f99fa78fd69add5234955c16ce4082df45a --- 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-dbf71c6-m [2022-10-17 17:21:53,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:21:53,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:21:53,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:21:53,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:21:53,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:21:53,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:21:53,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:21:53,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:21:53,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:21:53,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:21:53,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:21:53,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:21:53,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:21:53,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:21:53,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:21:53,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:21:53,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:21:53,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:21:53,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:21:53,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:21:53,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:21:53,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:21:53,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:21:53,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:21:53,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:21:53,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:21:53,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:21:53,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:21:53,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:21:53,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:21:53,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:21:53,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:21:53,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:21:53,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:21:53,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:21:53,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:21:53,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:21:53,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:21:53,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:21:53,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:21:53,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:21:53,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:21:53,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:21:53,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:21:53,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:21:53,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:21:53,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:21:53,394 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:21:53,394 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:21:53,394 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:21:53,394 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:21:53,395 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:21:53,395 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:21:53,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:21:53,396 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:21:53,396 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:21:53,396 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:21:53,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:21:53,397 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:21:53,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:21:53,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:21:53,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:21:53,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:21:53,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:21:53,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:21:53,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:21:53,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:21:53,407 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:21:53,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:21:53,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:21:53,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:21:53,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:21:53,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:21:53,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:53,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:21:53,409 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:21:53,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:21:53,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:21:53,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:21:53,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:21:53,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:21:53,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:21:53,410 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_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7573d0f26b9c64760f56bc1038037f99fa78fd69add5234955c16ce4082df45a [2022-10-17 17:21:53,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:21:53,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:21:53,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:21:53,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:21:53,723 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:21:53,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2022-10-17 17:21:53,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/data/756e9fc57/3cd3100367d344f9912d1b3d795a5382/FLAGca3ff452c [2022-10-17 17:21:54,363 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:21:54,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2022-10-17 17:21:54,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/data/756e9fc57/3cd3100367d344f9912d1b3d795a5382/FLAGca3ff452c [2022-10-17 17:21:54,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/data/756e9fc57/3cd3100367d344f9912d1b3d795a5382 [2022-10-17 17:21:54,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:21:54,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:21:54,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:54,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:21:54,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:21:54,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:54" (1/1) ... [2022-10-17 17:21:54,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f23ccbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:54, skipping insertion in model container [2022-10-17 17:21:54,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:54" (1/1) ... [2022-10-17 17:21:54,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:21:54,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:21:55,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2022-10-17 17:21:55,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:55,188 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:21:55,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2022-10-17 17:21:55,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:55,342 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:21:55,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55 WrapperNode [2022-10-17 17:21:55,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:55,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:55,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:21:55,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:21:55,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,440 INFO L138 Inliner]: procedures = 56, calls = 156, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 280 [2022-10-17 17:21:55,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:55,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:21:55,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:21:55,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:21:55,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:21:55,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:21:55,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:21:55,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:21:55,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (1/1) ... [2022-10-17 17:21:55,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:55,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:21:55,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:21:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:21:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-10-17 17:21:55,586 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-10-17 17:21:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:21:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:21:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:21:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:21:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:21:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:21:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-10-17 17:21:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-10-17 17:21:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:21:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-10-17 17:21:55,588 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-10-17 17:21:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:21:55,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:21:55,665 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:21:55,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:21:56,119 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:21:56,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:21:56,322 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:21:56,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:56 BoogieIcfgContainer [2022-10-17 17:21:56,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:21:56,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:21:56,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:21:56,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:21:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:21:54" (1/3) ... [2022-10-17 17:21:56,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab5621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:56, skipping insertion in model container [2022-10-17 17:21:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:55" (2/3) ... [2022-10-17 17:21:56,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab5621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:56, skipping insertion in model container [2022-10-17 17:21:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:56" (3/3) ... [2022-10-17 17:21:56,336 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product57.cil.c [2022-10-17 17:21:56,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:21:56,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:21:56,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:21:56,425 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;@33c9cb82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:21:56,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:21:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 17:21:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:21:56,441 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:56,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:56,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 576610716, now seen corresponding path program 1 times [2022-10-17 17:21:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:56,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131252056] [2022-10-17 17:21:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:56,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131252056] [2022-10-17 17:21:56,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131252056] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:56,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:56,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808081308] [2022-10-17 17:21:56,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:21:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:21:56,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:21:56,812 INFO L87 Difference]: Start difference. First operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) 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) [2022-10-17 17:21:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:56,919 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2022-10-17 17:21:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:21:56,922 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 [2022-10-17 17:21:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:56,933 INFO L225 Difference]: With dead ends: 100 [2022-10-17 17:21:56,934 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:21:56,938 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 [2022-10-17 17:21:56,943 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:56,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:21:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-17 17:21:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 37 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:21:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-10-17 17:21:56,997 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 12 [2022-10-17 17:21:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:56,998 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-10-17 17:21:56,998 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) [2022-10-17 17:21:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-10-17 17:21:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:21:57,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:57,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:57,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:21:57,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1435718459, now seen corresponding path program 1 times [2022-10-17 17:21:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101945383] [2022-10-17 17:21:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:57,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101945383] [2022-10-17 17:21:57,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101945383] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:57,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:57,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533406937] [2022-10-17 17:21:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:57,179 INFO L87 Difference]: Start difference. First operand 46 states and 59 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) [2022-10-17 17:21:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:57,228 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-10-17 17:21:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:57,228 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 [2022-10-17 17:21:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:57,230 INFO L225 Difference]: With dead ends: 69 [2022-10-17 17:21:57,230 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:21:57,231 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 [2022-10-17 17:21:57,233 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:57,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 59 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:21:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:21:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-17 17:21:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 17:21:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-10-17 17:21:57,242 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 13 [2022-10-17 17:21:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:57,242 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-10-17 17:21:57,243 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) [2022-10-17 17:21:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-10-17 17:21:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:21:57,244 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:57,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:57,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:21:57,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2094359470, now seen corresponding path program 1 times [2022-10-17 17:21:57,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:57,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628709265] [2022-10-17 17:21:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:57,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628709265] [2022-10-17 17:21:57,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628709265] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:57,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:57,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905859221] [2022-10-17 17:21:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:57,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:57,423 INFO L87 Difference]: Start difference. First operand 38 states and 48 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) [2022-10-17 17:21:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:57,560 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-10-17 17:21:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:21:57,561 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 [2022-10-17 17:21:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:57,563 INFO L225 Difference]: With dead ends: 74 [2022-10-17 17:21:57,563 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:21:57,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:57,573 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:57,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:21:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-17 17:21:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.32) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 17:21:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-10-17 17:21:57,587 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 15 [2022-10-17 17:21:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:57,587 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-10-17 17:21:57,588 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) [2022-10-17 17:21:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-10-17 17:21:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:21:57,589 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:57,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:21:57,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash 633221315, now seen corresponding path program 1 times [2022-10-17 17:21:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:57,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967451004] [2022-10-17 17:21:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:57,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:57,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:57,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967451004] [2022-10-17 17:21:57,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967451004] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:57,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:57,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391053013] [2022-10-17 17:21:57,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:57,759 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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) [2022-10-17 17:21:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:57,854 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-10-17 17:21:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 [2022-10-17 17:21:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:57,858 INFO L225 Difference]: With dead ends: 104 [2022-10-17 17:21:57,858 INFO L226 Difference]: Without dead ends: 68 [2022-10-17 17:21:57,861 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 [2022-10-17 17:21:57,870 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:57,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:21:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-17 17:21:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-10-17 17:21:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-10-17 17:21:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-10-17 17:21:57,899 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 18 [2022-10-17 17:21:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:57,904 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-10-17 17:21:57,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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) [2022-10-17 17:21:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-10-17 17:21:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:21:57,906 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:57,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:21:57,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1809641867, now seen corresponding path program 1 times [2022-10-17 17:21:57,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:57,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141406128] [2022-10-17 17:21:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:57,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:58,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141406128] [2022-10-17 17:21:58,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141406128] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:58,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:58,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:21:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945950344] [2022-10-17 17:21:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:21:58,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:21:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:58,196 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:21:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:58,336 INFO L93 Difference]: Finished difference Result 179 states and 222 transitions. [2022-10-17 17:21:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:21:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-10-17 17:21:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:58,342 INFO L225 Difference]: With dead ends: 179 [2022-10-17 17:21:58,342 INFO L226 Difference]: Without dead ends: 115 [2022-10-17 17:21:58,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:21:58,350 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:58,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 154 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-10-17 17:21:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-10-17 17:21:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 78 states have internal predecessors, (84), 14 states have call successors, (14), 14 states have call predecessors, (14), 16 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-10-17 17:21:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-10-17 17:21:58,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 23 [2022-10-17 17:21:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:58,395 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-10-17 17:21:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:21:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-10-17 17:21:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 17:21:58,401 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:58,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:21:58,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1278145829, now seen corresponding path program 1 times [2022-10-17 17:21:58,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:58,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797538015] [2022-10-17 17:21:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:58,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:58,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:58,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797538015] [2022-10-17 17:21:58,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797538015] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:58,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:58,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:21:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898808454] [2022-10-17 17:21:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:21:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:21:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:21:58,683 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:21:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:59,135 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-10-17 17:21:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:21:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-10-17 17:21:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:59,140 INFO L225 Difference]: With dead ends: 251 [2022-10-17 17:21:59,140 INFO L226 Difference]: Without dead ends: 187 [2022-10-17 17:21:59,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:21:59,144 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 127 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:59,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 246 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:21:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-17 17:21:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2022-10-17 17:21:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 132 states have internal predecessors, (142), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (35), 26 states have call predecessors, (35), 24 states have call successors, (35) [2022-10-17 17:21:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2022-10-17 17:21:59,202 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 26 [2022-10-17 17:21:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:59,203 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2022-10-17 17:21:59,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:21:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2022-10-17 17:21:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:21:59,208 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:59,208 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] [2022-10-17 17:21:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:21:59,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1647794668, now seen corresponding path program 1 times [2022-10-17 17:21:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753782804] [2022-10-17 17:21:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:59,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753782804] [2022-10-17 17:21:59,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753782804] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:59,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:59,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:21:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232071512] [2022-10-17 17:21:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:59,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:21:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:21:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:21:59,682 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:21:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:59,978 INFO L93 Difference]: Finished difference Result 280 states and 345 transitions. [2022-10-17 17:21:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:21:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-10-17 17:21:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:59,984 INFO L225 Difference]: With dead ends: 280 [2022-10-17 17:21:59,984 INFO L226 Difference]: Without dead ends: 209 [2022-10-17 17:21:59,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:21:59,986 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 108 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:59,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 118 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:21:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-10-17 17:22:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2022-10-17 17:22:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 132 states have internal predecessors, (144), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) [2022-10-17 17:22:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2022-10-17 17:22:00,028 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 39 [2022-10-17 17:22:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:00,029 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2022-10-17 17:22:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2022-10-17 17:22:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 17:22:00,033 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:00,033 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, 1, 1, 1] [2022-10-17 17:22:00,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:22:00,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash -497882746, now seen corresponding path program 1 times [2022-10-17 17:22:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:00,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745206172] [2022-10-17 17:22:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:00,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:00,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:00,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745206172] [2022-10-17 17:22:00,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745206172] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:00,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618096825] [2022-10-17 17:22:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:00,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:00,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:00,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:00,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:22:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:00,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-17 17:22:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:01,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:01,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618096825] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181049484] [2022-10-17 17:22:01,850 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-10-17 17:22:01,850 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:01,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:01,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:01,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:11,558 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 319 for LOIs [2022-10-17 17:22:11,658 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2022-10-17 17:22:11,797 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-10-17 17:22:11,827 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:22:19,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3075#(and (<= 0 |old(~pumpRunning~0)|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| |timeShift_getWaterLevel_#res#1|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (= ~methaneLevelCritical~0 0) (<= |old(~pumpRunning~0)| 1) (= |timeShift_getWaterLevel_~retValue_acc~5#1| |timeShift_getWaterLevel_#res#1|) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~5#1| ~waterLevel~0) (<= 0 ~pumpRunning~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-10-17 17:22:19,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:22:19,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:22:19,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 11] total 30 [2022-10-17 17:22:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861030083] [2022-10-17 17:22:19,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:22:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-17 17:22:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-17 17:22:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 17:22:19,873 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 30 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 10 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:22:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:24,870 INFO L93 Difference]: Finished difference Result 1032 states and 1364 transitions. [2022-10-17 17:22:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-10-17 17:22:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 10 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 42 [2022-10-17 17:22:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:24,879 INFO L225 Difference]: With dead ends: 1032 [2022-10-17 17:22:24,880 INFO L226 Difference]: Without dead ends: 945 [2022-10-17 17:22:24,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1942, Invalid=14314, Unknown=0, NotChecked=0, Total=16256 [2022-10-17 17:22:24,886 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1458 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:24,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 803 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 17:22:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-10-17 17:22:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 712. [2022-10-17 17:22:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 502 states have (on average 1.1932270916334662) internal successors, (599), 546 states have internal predecessors, (599), 100 states have call successors, (100), 90 states have call predecessors, (100), 109 states have return successors, (155), 105 states have call predecessors, (155), 100 states have call successors, (155) [2022-10-17 17:22:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 854 transitions. [2022-10-17 17:22:25,001 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 854 transitions. Word has length 42 [2022-10-17 17:22:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:25,002 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 854 transitions. [2022-10-17 17:22:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 10 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:22:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 854 transitions. [2022-10-17 17:22:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-17 17:22:25,005 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:25,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:25,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6156d80b-7f22-4565-8484-666622a6daa3/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 17:22:25,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -796623641, now seen corresponding path program 2 times [2022-10-17 17:22:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:25,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872085182] [2022-10-17 17:22:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat