./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:01:46,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:01:46,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:01:46,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:01:46,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:01:46,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:01:46,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:01:46,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:01:46,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:01:46,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:01:46,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:01:46,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:01:46,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:01:46,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:01:46,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:01:46,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:01:46,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:01:46,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:01:46,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:01:46,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:01:46,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:01:46,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:01:46,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:01:46,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:01:46,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:01:46,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:01:46,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:01:46,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:01:46,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:01:46,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:01:46,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:01:46,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:01:46,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:01:46,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:01:46,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:01:46,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:01:46,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:01:46,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:01:46,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:01:46,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:01:46,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:01:46,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:01:46,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:01:46,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:01:46,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:01:46,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:01:46,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:01:46,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:01:46,458 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:01:46,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:01:46,459 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:01:46,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:01:46,460 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:01:46,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:01:46,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:01:46,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:01:46,461 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:01:46,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:01:46,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:01:46,461 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:01:46,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:01:46,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:01:46,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:01:46,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:01:46,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:01:46,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:01:46,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:01:46,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:01:46,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:01:46,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:01:46,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:01:46,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:01:46,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:01:46,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:01:46,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:46,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:01:46,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:01:46,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:01:46,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:01:46,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:01:46,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:01:46,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:01:46,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:01:46,466 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_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2022-11-03 02:01:46,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:01:46,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:01:46,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:01:46,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:01:46,868 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:01:46,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-03 02:01:46,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/data/0f36266f2/409a046be7894974a643d73408d8789f/FLAGa875e8001 [2022-11-03 02:01:47,514 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:01:47,520 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-03 02:01:47,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/data/0f36266f2/409a046be7894974a643d73408d8789f/FLAGa875e8001 [2022-11-03 02:01:47,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/data/0f36266f2/409a046be7894974a643d73408d8789f [2022-11-03 02:01:47,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:01:47,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:01:47,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:47,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:01:47,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:01:47,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:47" (1/1) ... [2022-11-03 02:01:47,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58576fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:47, skipping insertion in model container [2022-11-03 02:01:47,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:47" (1/1) ... [2022-11-03 02:01:47,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:01:47,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:48,154 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_6566540e-9960-4518-9c1f-c13aa7240c95/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-03 02:01:48,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:48,337 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:01:48,379 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_6566540e-9960-4518-9c1f-c13aa7240c95/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-03 02:01:48,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:48,469 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:01:48,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48 WrapperNode [2022-11-03 02:01:48,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:48,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:48,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:01:48,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:01:48,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,547 INFO L138 Inliner]: procedures = 65, calls = 180, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 356 [2022-11-03 02:01:48,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:48,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:01:48,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:01:48,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:01:48,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,584 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:01:48,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:01:48,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:01:48,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:01:48,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (1/1) ... [2022-11-03 02:01:48,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:48,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:48,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:01:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:01:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:01:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2022-11-03 02:01:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2022-11-03 02:01:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:01:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:01:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:01:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:01:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2022-11-03 02:01:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2022-11-03 02:01:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-03 02:01:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-03 02:01:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2022-11-03 02:01:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2022-11-03 02:01:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-11-03 02:01:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-11-03 02:01:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2022-11-03 02:01:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2022-11-03 02:01:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-03 02:01:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-03 02:01:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-03 02:01:48,686 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-03 02:01:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:01:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-11-03 02:01:48,686 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-11-03 02:01:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-03 02:01:48,686 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-03 02:01:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:01:48,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:01:48,814 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:01:48,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:01:49,389 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:01:49,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:01:49,512 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:01:49,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:49 BoogieIcfgContainer [2022-11-03 02:01:49,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:01:49,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:01:49,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:01:49,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:01:49,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:01:47" (1/3) ... [2022-11-03 02:01:49,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@add9310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:49, skipping insertion in model container [2022-11-03 02:01:49,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:48" (2/3) ... [2022-11-03 02:01:49,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@add9310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:49, skipping insertion in model container [2022-11-03 02:01:49,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:49" (3/3) ... [2022-11-03 02:01:49,525 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2022-11-03 02:01:49,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:01:49,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:01:49,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:01:49,622 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;@7533322f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:01:49,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:01:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:01:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:01:49,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:49,640 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:49,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2022-11-03 02:01:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:49,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612949200] [2022-11-03 02:01:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:49,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:01:49,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612949200] [2022-11-03 02:01:49,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612949200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:49,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:49,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:01:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213549636] [2022-11-03 02:01:49,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:49,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:01:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:01:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:01:50,019 INFO L87 Difference]: Start difference. First operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:01:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:50,146 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2022-11-03 02:01:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:01:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-03 02:01:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:50,165 INFO L225 Difference]: With dead ends: 204 [2022-11-03 02:01:50,166 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:01:50,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:01:50,175 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:50,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:01:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-03 02:01:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-03 02:01:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2022-11-03 02:01:50,256 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2022-11-03 02:01:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:50,258 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2022-11-03 02:01:50,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:01:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2022-11-03 02:01:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:01:50,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:50,261 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:01:50,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2022-11-03 02:01:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782957740] [2022-11-03 02:01:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:01:50,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782957740] [2022-11-03 02:01:50,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782957740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:50,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:50,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:01:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922501041] [2022-11-03 02:01:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:50,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:01:50,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:01:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:01:50,441 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:01:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:50,527 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2022-11-03 02:01:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:01:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2022-11-03 02:01:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:50,531 INFO L225 Difference]: With dead ends: 167 [2022-11-03 02:01:50,533 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:01:50,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:01:50,538 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:50,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:01:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-03 02:01:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 73 states have internal predecessors, (79), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:01:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-11-03 02:01:50,562 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2022-11-03 02:01:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:50,563 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-11-03 02:01:50,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:01:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-11-03 02:01:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:01:50,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:50,565 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:50,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:01:50,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2022-11-03 02:01:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:50,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877350604] [2022-11-03 02:01:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:50,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:01:50,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877350604] [2022-11-03 02:01:50,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877350604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:50,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:50,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:01:50,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512968759] [2022-11-03 02:01:50,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:50,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:01:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:01:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:01:50,850 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:01:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:51,147 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-03 02:01:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:01:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-11-03 02:01:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:51,150 INFO L225 Difference]: With dead ends: 235 [2022-11-03 02:01:51,151 INFO L226 Difference]: Without dead ends: 154 [2022-11-03 02:01:51,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:01:51,153 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 81 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:51,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 538 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:01:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-03 02:01:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-11-03 02:01:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 112 states have internal predecessors, (126), 35 states have call successors, (35), 19 states have call predecessors, (35), 19 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2022-11-03 02:01:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2022-11-03 02:01:51,175 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2022-11-03 02:01:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:51,176 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2022-11-03 02:01:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:01:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2022-11-03 02:01:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:01:51,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:51,179 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:01:51,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2022-11-03 02:01:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926047202] [2022-11-03 02:01:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:01:51,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926047202] [2022-11-03 02:01:51,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926047202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:51,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:51,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:01:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892557098] [2022-11-03 02:01:51,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:51,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:01:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:51,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:01:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:01:51,662 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:01:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:51,999 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2022-11-03 02:01:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:01:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) Word has length 67 [2022-11-03 02:01:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:52,011 INFO L225 Difference]: With dead ends: 421 [2022-11-03 02:01:52,011 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:01:52,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:01:52,018 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:52,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 440 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:01:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:01:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-11-03 02:01:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 180 states have internal predecessors, (207), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (69), 50 states have call predecessors, (69), 50 states have call successors, (69) [2022-11-03 02:01:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-11-03 02:01:52,085 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2022-11-03 02:01:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:52,087 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-11-03 02:01:52,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:01:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-11-03 02:01:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:01:52,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:52,096 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:01:52,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2022-11-03 02:01:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541484246] [2022-11-03 02:01:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:01:52,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541484246] [2022-11-03 02:01:52,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541484246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:52,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:52,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455177325] [2022-11-03 02:01:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:52,695 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:01:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:53,775 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2022-11-03 02:01:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:01:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-03 02:01:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:53,780 INFO L225 Difference]: With dead ends: 593 [2022-11-03 02:01:53,780 INFO L226 Difference]: Without dead ends: 420 [2022-11-03 02:01:53,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:01:53,783 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 412 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:53,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 405 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:01:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-03 02:01:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2022-11-03 02:01:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 253 states have (on average 1.3122529644268774) internal successors, (332), 290 states have internal predecessors, (332), 76 states have call successors, (76), 43 states have call predecessors, (76), 51 states have return successors, (107), 82 states have call predecessors, (107), 76 states have call successors, (107) [2022-11-03 02:01:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-11-03 02:01:53,841 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2022-11-03 02:01:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:53,842 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-11-03 02:01:53,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:01:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-11-03 02:01:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:01:53,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:53,846 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:53,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:01:53,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2022-11-03 02:01:53,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:53,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845571463] [2022-11-03 02:01:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:01:54,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845571463] [2022-11-03 02:01:54,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845571463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:54,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:54,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:54,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384411396] [2022-11-03 02:01:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:54,125 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:01:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:55,123 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2022-11-03 02:01:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:01:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2022-11-03 02:01:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:55,132 INFO L225 Difference]: With dead ends: 802 [2022-11-03 02:01:55,133 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 02:01:55,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:01:55,138 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 198 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:55,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 804 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:01:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 02:01:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2022-11-03 02:01:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 371 states have (on average 1.3099730458221024) internal successors, (486), 420 states have internal predecessors, (486), 104 states have call successors, (104), 67 states have call predecessors, (104), 77 states have return successors, (157), 110 states have call predecessors, (157), 104 states have call successors, (157) [2022-11-03 02:01:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2022-11-03 02:01:55,241 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2022-11-03 02:01:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:55,241 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2022-11-03 02:01:55,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:01:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2022-11-03 02:01:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:01:55,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:55,246 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:55,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:01:55,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2022-11-03 02:01:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:55,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832935448] [2022-11-03 02:01:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:01:55,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832935448] [2022-11-03 02:01:55,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832935448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120166291] [2022-11-03 02:01:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:55,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:55,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:55,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:55,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:01:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:01:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:01:55,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:01:56,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120166291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909451343] [2022-11-03 02:01:56,326 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 02:01:56,327 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:56,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:56,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:56,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:09,470 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 89 for LOIs [2022-11-03 02:02:09,489 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 91 for LOIs [2022-11-03 02:02:10,298 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 55 for LOIs [2022-11-03 02:02:10,351 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 52 for LOIs [2022-11-03 02:02:10,356 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:02:10,377 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 53 for LOIs [2022-11-03 02:02:10,573 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 57 for LOIs [2022-11-03 02:02:10,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:33,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6941#(and (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (= ~__SELECTED_FEATURE_methaneQuery~0 0) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 2 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:33,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:33,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:33,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-11-03 02:02:33,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290763025] [2022-11-03 02:02:33,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:33,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:33,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:02:33,423 INFO L87 Difference]: Start difference. First operand 553 states and 747 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-11-03 02:02:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:34,572 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2022-11-03 02:02:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:02:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 106 [2022-11-03 02:02:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:34,580 INFO L225 Difference]: With dead ends: 1099 [2022-11-03 02:02:34,580 INFO L226 Difference]: Without dead ends: 632 [2022-11-03 02:02:34,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 261 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=443, Invalid=4387, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 02:02:34,585 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 256 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:34,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1020 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:02:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-03 02:02:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2022-11-03 02:02:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 356 states have (on average 1.2865168539325842) internal successors, (458), 400 states have internal predecessors, (458), 105 states have call successors, (105), 74 states have call predecessors, (105), 81 states have return successors, (147), 109 states have call predecessors, (147), 105 states have call successors, (147) [2022-11-03 02:02:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2022-11-03 02:02:34,645 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2022-11-03 02:02:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:34,646 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2022-11-03 02:02:34,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-11-03 02:02:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2022-11-03 02:02:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:02:34,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:34,651 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:34,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:02:34,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2022-11-03 02:02:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542718832] [2022-11-03 02:02:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 02:02:35,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542718832] [2022-11-03 02:02:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542718832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366984107] [2022-11-03 02:02:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:35,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:35,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:35,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:35,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:02:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 02:02:35,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:35,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366984107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:35,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:02:35,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-03 02:02:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875766702] [2022-11-03 02:02:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:35,366 INFO L87 Difference]: Start difference. First operand 543 states and 710 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:02:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:35,468 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2022-11-03 02:02:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2022-11-03 02:02:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:35,472 INFO L225 Difference]: With dead ends: 1222 [2022-11-03 02:02:35,472 INFO L226 Difference]: Without dead ends: 714 [2022-11-03 02:02:35,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:35,475 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:35,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 254 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-03 02:02:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2022-11-03 02:02:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 462 states have (on average 1.29004329004329) internal successors, (596), 519 states have internal predecessors, (596), 131 states have call successors, (131), 95 states have call predecessors, (131), 103 states have return successors, (186), 132 states have call predecessors, (186), 131 states have call successors, (186) [2022-11-03 02:02:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2022-11-03 02:02:35,554 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2022-11-03 02:02:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:35,556 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2022-11-03 02:02:35,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:02:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2022-11-03 02:02:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:02:35,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:35,561 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:35,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:35,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2022-11-03 02:02:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916630924] [2022-11-03 02:02:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:02:36,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916630924] [2022-11-03 02:02:36,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916630924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546463345] [2022-11-03 02:02:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:36,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:36,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:36,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:02:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:02:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:02:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 02:02:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546463345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752713826] [2022-11-03 02:02:36,855 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:02:36,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:36,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:36,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:36,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:49,738 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 84 for LOIs [2022-11-03 02:02:49,749 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 81 for LOIs [2022-11-03 02:02:50,449 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 80 for LOIs [2022-11-03 02:02:50,544 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2022-11-03 02:02:50,547 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:02:50,560 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 78 for LOIs [2022-11-03 02:02:50,820 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-03 02:02:50,833 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-03 02:02:50,837 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:18,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13776#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:18,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:18,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:18,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-03 02:03:18,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264159354] [2022-11-03 02:03:18,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:18,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:03:18,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:03:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=5660, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:03:18,281 INFO L87 Difference]: Start difference. First operand 697 states and 913 transitions. Second operand has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-03 02:03:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:24,218 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2022-11-03 02:03:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-03 02:03:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) Word has length 149 [2022-11-03 02:03:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:24,228 INFO L225 Difference]: With dead ends: 2312 [2022-11-03 02:03:24,228 INFO L226 Difference]: Without dead ends: 1655 [2022-11-03 02:03:24,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 404 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10466 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=1948, Invalid=23812, Unknown=0, NotChecked=0, Total=25760 [2022-11-03 02:03:24,238 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1935 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 1758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1939 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1758 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:24,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1939 Valid, 2182 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1758 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:03:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-03 02:03:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2022-11-03 02:03:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 723 states have (on average 1.2669432918395573) internal successors, (916), 814 states have internal predecessors, (916), 205 states have call successors, (205), 157 states have call predecessors, (205), 175 states have return successors, (315), 209 states have call predecessors, (315), 205 states have call successors, (315) [2022-11-03 02:03:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2022-11-03 02:03:24,353 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2022-11-03 02:03:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:24,353 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2022-11-03 02:03:24,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-03 02:03:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2022-11-03 02:03:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:03:24,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:24,359 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:24,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:24,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:24,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2022-11-03 02:03:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:24,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911188736] [2022-11-03 02:03:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:24,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:03:24,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:24,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911188736] [2022-11-03 02:03:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911188736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78713056] [2022-11-03 02:03:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:24,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:24,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:24,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:24,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:03:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:03:24,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:24,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78713056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:24,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:24,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:03:24,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558371416] [2022-11-03 02:03:24,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:24,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:24,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:24,861 INFO L87 Difference]: Start difference. First operand 1104 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:25,084 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2022-11-03 02:03:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2022-11-03 02:03:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:25,095 INFO L225 Difference]: With dead ends: 3011 [2022-11-03 02:03:25,095 INFO L226 Difference]: Without dead ends: 1940 [2022-11-03 02:03:25,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:25,101 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 73 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:25,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 256 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-03 02:03:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2022-11-03 02:03:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1270 states have (on average 1.252755905511811) internal successors, (1591), 1421 states have internal predecessors, (1591), 336 states have call successors, (336), 269 states have call predecessors, (336), 304 states have return successors, (551), 340 states have call predecessors, (551), 336 states have call successors, (551) [2022-11-03 02:03:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2022-11-03 02:03:25,355 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2022-11-03 02:03:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:25,355 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2022-11-03 02:03:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2022-11-03 02:03:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:03:25,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:25,362 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:25,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:25,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:03:25,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2022-11-03 02:03:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904963772] [2022-11-03 02:03:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:25,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:03:25,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904963772] [2022-11-03 02:03:25,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904963772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736545418] [2022-11-03 02:03:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:25,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:25,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:25,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:03:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:03:25,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:25,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736545418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:25,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:25,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:03:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441599945] [2022-11-03 02:03:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:25,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:25,881 INFO L87 Difference]: Start difference. First operand 1911 states and 2478 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:26,213 INFO L93 Difference]: Finished difference Result 5373 states and 7275 transitions. [2022-11-03 02:03:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:26,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2022-11-03 02:03:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:26,233 INFO L225 Difference]: With dead ends: 5373 [2022-11-03 02:03:26,234 INFO L226 Difference]: Without dead ends: 3480 [2022-11-03 02:03:26,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:26,244 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:26,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-11-03 02:03:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3460. [2022-11-03 02:03:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 2322 states have (on average 1.2472006890611542) internal successors, (2896), 2573 states have internal predecessors, (2896), 587 states have call successors, (587), 498 states have call predecessors, (587), 550 states have return successors, (1094), 579 states have call predecessors, (1094), 587 states have call successors, (1094) [2022-11-03 02:03:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4577 transitions. [2022-11-03 02:03:26,635 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4577 transitions. Word has length 141 [2022-11-03 02:03:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:26,636 INFO L495 AbstractCegarLoop]: Abstraction has 3460 states and 4577 transitions. [2022-11-03 02:03:26,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4577 transitions. [2022-11-03 02:03:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:03:26,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:26,646 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:26,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:26,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:03:26,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1506060448, now seen corresponding path program 1 times [2022-11-03 02:03:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:26,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394220734] [2022-11-03 02:03:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:03:27,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394220734] [2022-11-03 02:03:27,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394220734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:27,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:27,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:03:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528556036] [2022-11-03 02:03:27,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:03:27,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:03:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:03:27,039 INFO L87 Difference]: Start difference. First operand 3460 states and 4577 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:03:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:27,946 INFO L93 Difference]: Finished difference Result 8799 states and 11779 transitions. [2022-11-03 02:03:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:03:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2022-11-03 02:03:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:28,036 INFO L225 Difference]: With dead ends: 8799 [2022-11-03 02:03:28,036 INFO L226 Difference]: Without dead ends: 6593 [2022-11-03 02:03:28,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:03:28,045 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 216 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:28,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 701 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:03:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2022-11-03 02:03:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6559. [2022-11-03 02:03:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 4416 states have (on average 1.247282608695652) internal successors, (5508), 4872 states have internal predecessors, (5508), 1101 states have call successors, (1101), 953 states have call predecessors, (1101), 1041 states have return successors, (2045), 1087 states have call predecessors, (2045), 1101 states have call successors, (2045) [2022-11-03 02:03:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 8654 transitions. [2022-11-03 02:03:28,873 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 8654 transitions. Word has length 145 [2022-11-03 02:03:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:28,873 INFO L495 AbstractCegarLoop]: Abstraction has 6559 states and 8654 transitions. [2022-11-03 02:03:28,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:03:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 8654 transitions. [2022-11-03 02:03:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:03:28,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:28,892 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:28,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:03:28,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2022-11-03 02:03:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:28,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758816992] [2022-11-03 02:03:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:28,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:03:28,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758816992] [2022-11-03 02:03:28,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758816992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020248884] [2022-11-03 02:03:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:28,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:28,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:28,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:03:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:29,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:03:29,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020248884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:29,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:29,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:03:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846748995] [2022-11-03 02:03:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:29,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:29,231 INFO L87 Difference]: Start difference. First operand 6559 states and 8654 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:30,004 INFO L93 Difference]: Finished difference Result 10086 states and 13190 transitions. [2022-11-03 02:03:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2022-11-03 02:03:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:30,040 INFO L225 Difference]: With dead ends: 10086 [2022-11-03 02:03:30,040 INFO L226 Difference]: Without dead ends: 6869 [2022-11-03 02:03:30,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:30,053 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 62 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:30,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6869 states. [2022-11-03 02:03:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6869 to 6655. [2022-11-03 02:03:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 4481 states have (on average 1.2468199062709218) internal successors, (5587), 4943 states have internal predecessors, (5587), 1117 states have call successors, (1117), 982 states have call predecessors, (1117), 1056 states have return successors, (1788), 1085 states have call predecessors, (1788), 1117 states have call successors, (1788) [2022-11-03 02:03:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 8492 transitions. [2022-11-03 02:03:31,048 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 8492 transitions. Word has length 143 [2022-11-03 02:03:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:31,049 INFO L495 AbstractCegarLoop]: Abstraction has 6655 states and 8492 transitions. [2022-11-03 02:03:31,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:03:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 8492 transitions. [2022-11-03 02:03:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:03:31,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:31,068 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:31,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:03:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:03:31,294 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash -397506819, now seen corresponding path program 1 times [2022-11-03 02:03:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130357173] [2022-11-03 02:03:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:03:31,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:31,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130357173] [2022-11-03 02:03:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130357173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855702815] [2022-11-03 02:03:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:31,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:31,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:03:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:31,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:03:31,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:31,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855702815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:31,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:31,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2022-11-03 02:03:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065437989] [2022-11-03 02:03:31,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:31,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:31,636 INFO L87 Difference]: Start difference. First operand 6655 states and 8492 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:03:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:32,399 INFO L93 Difference]: Finished difference Result 9947 states and 12534 transitions. [2022-11-03 02:03:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-03 02:03:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:32,446 INFO L225 Difference]: With dead ends: 9947 [2022-11-03 02:03:32,447 INFO L226 Difference]: Without dead ends: 6657 [2022-11-03 02:03:32,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:32,457 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 53 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:32,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-11-03 02:03:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 5499. [2022-11-03 02:03:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3715 states have (on average 1.2398384925975774) internal successors, (4606), 4092 states have internal predecessors, (4606), 915 states have call successors, (915), 814 states have call predecessors, (915), 868 states have return successors, (1308), 886 states have call predecessors, (1308), 915 states have call successors, (1308) [2022-11-03 02:03:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2022-11-03 02:03:33,172 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 146 [2022-11-03 02:03:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:33,172 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2022-11-03 02:03:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:03:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2022-11-03 02:03:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:03:33,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:33,190 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:33,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:03:33,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2022-11-03 02:03:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:33,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665165365] [2022-11-03 02:03:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:03:34,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665165365] [2022-11-03 02:03:34,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665165365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900688069] [2022-11-03 02:03:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:34,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:34,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:34,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:03:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:03:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:03:35,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:03:36,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900688069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529349606] [2022-11-03 02:03:36,482 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-03 02:03:36,483 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:36,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:36,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:36,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:45,352 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 85 for LOIs [2022-11-03 02:03:45,362 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 91 for LOIs [2022-11-03 02:03:45,966 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 55 for LOIs [2022-11-03 02:03:46,154 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 52 for LOIs [2022-11-03 02:03:46,158 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:03:46,177 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 57 for LOIs [2022-11-03 02:03:46,340 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-03 02:03:46,345 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 63 for LOIs [2022-11-03 02:03:46,351 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:12,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115298#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~systemActive~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 1) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= 0 ~__SELECTED_FEATURE_methaneAlarm~0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= ~__SELECTED_FEATURE_methaneAlarm~0 0) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:04:12,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:04:12,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:12,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 11] total 32 [2022-11-03 02:04:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164547272] [2022-11-03 02:04:12,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:04:12,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:04:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=6432, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 02:04:12,395 INFO L87 Difference]: Start difference. First operand 5499 states and 6829 transitions. Second operand has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 31 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:04:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:19,366 INFO L93 Difference]: Finished difference Result 14935 states and 19704 transitions. [2022-11-03 02:04:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:04:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 31 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) Word has length 145 [2022-11-03 02:04:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:19,429 INFO L225 Difference]: With dead ends: 14935 [2022-11-03 02:04:19,429 INFO L226 Difference]: Without dead ends: 12106 [2022-11-03 02:04:19,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 380 SyntacticMatches, 20 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9421 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=1631, Invalid=17275, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 02:04:19,448 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2748 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 1869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2756 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 5882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1869 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:19,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2756 Valid, 1496 Invalid, 5882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1869 Valid, 4013 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 02:04:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2022-11-03 02:04:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 8228. [2022-11-03 02:04:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8228 states, 5588 states have (on average 1.2349677881173944) internal successors, (6901), 6116 states have internal predecessors, (6901), 1363 states have call successors, (1363), 1193 states have call predecessors, (1363), 1276 states have return successors, (1873), 1315 states have call predecessors, (1873), 1363 states have call successors, (1873) [2022-11-03 02:04:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 10137 transitions. [2022-11-03 02:04:20,435 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 10137 transitions. Word has length 145 [2022-11-03 02:04:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:20,436 INFO L495 AbstractCegarLoop]: Abstraction has 8228 states and 10137 transitions. [2022-11-03 02:04:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 31 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:04:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 10137 transitions. [2022-11-03 02:04:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-03 02:04:20,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:20,460 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:20,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:20,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:04:20,674 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2022-11-03 02:04:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:20,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583263625] [2022-11-03 02:04:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:20,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-03 02:04:20,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583263625] [2022-11-03 02:04:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583263625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958329097] [2022-11-03 02:04:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:20,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:20,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:04:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:20,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:04:20,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958329097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:20,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:20,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:04:20,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729826007] [2022-11-03 02:04:20,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:04:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:04:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:20,967 INFO L87 Difference]: Start difference. First operand 8228 states and 10137 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 02:04:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:22,178 INFO L93 Difference]: Finished difference Result 17695 states and 22202 transitions. [2022-11-03 02:04:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:04:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 175 [2022-11-03 02:04:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:22,224 INFO L225 Difference]: With dead ends: 17695 [2022-11-03 02:04:22,224 INFO L226 Difference]: Without dead ends: 9795 [2022-11-03 02:04:22,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:22,250 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:22,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2022-11-03 02:04:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9747. [2022-11-03 02:04:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 6685 states have (on average 1.2254300673148841) internal successors, (8192), 7211 states have internal predecessors, (8192), 1547 states have call successors, (1547), 1448 states have call predecessors, (1547), 1514 states have return successors, (2307), 1473 states have call predecessors, (2307), 1547 states have call successors, (2307) [2022-11-03 02:04:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 12046 transitions. [2022-11-03 02:04:23,256 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 12046 transitions. Word has length 175 [2022-11-03 02:04:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 9747 states and 12046 transitions. [2022-11-03 02:04:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 02:04:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 12046 transitions. [2022-11-03 02:04:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-03 02:04:23,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:23,285 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:23,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:23,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:04:23,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:23,499 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2022-11-03 02:04:23,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:23,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402094471] [2022-11-03 02:04:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 02:04:24,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402094471] [2022-11-03 02:04:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402094471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988340470] [2022-11-03 02:04:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:24,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:24,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:24,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:24,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:04:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:04:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:04:25,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:04:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988340470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2052390935] [2022-11-03 02:04:27,774 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:04:27,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:27,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:27,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:27,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:39,398 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 60 for LOIs [2022-11-03 02:04:39,404 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 79 for LOIs [2022-11-03 02:04:39,995 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 78 for LOIs [2022-11-03 02:04:40,072 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-03 02:04:40,075 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:04:40,087 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 76 for LOIs [2022-11-03 02:04:40,390 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-03 02:04:40,400 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 78 for LOIs [2022-11-03 02:04:40,408 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-03 02:04:40,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:07,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193956#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:05:07,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:05:07,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:07,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 40 [2022-11-03 02:05:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593461417] [2022-11-03 02:05:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:07,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:05:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:05:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=8885, Unknown=0, NotChecked=0, Total=9702 [2022-11-03 02:05:07,962 INFO L87 Difference]: Start difference. First operand 9747 states and 12046 transitions. Second operand has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2022-11-03 02:05:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:15,849 INFO L93 Difference]: Finished difference Result 18229 states and 22391 transitions. [2022-11-03 02:05:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 02:05:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) Word has length 178 [2022-11-03 02:05:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:15,885 INFO L225 Difference]: With dead ends: 18229 [2022-11-03 02:05:15,885 INFO L226 Difference]: Without dead ends: 9940 [2022-11-03 02:05:15,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 473 SyntacticMatches, 15 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9661 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=1790, Invalid=19672, Unknown=0, NotChecked=0, Total=21462 [2022-11-03 02:05:15,908 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 2707 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 1919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 6604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1919 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:15,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 2379 Invalid, 6604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1919 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:05:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-11-03 02:05:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9772. [2022-11-03 02:05:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 6686 states have (on average 1.2104397247980856) internal successors, (8093), 7173 states have internal predecessors, (8093), 1582 states have call successors, (1582), 1473 states have call predecessors, (1582), 1503 states have return successors, (2146), 1511 states have call predecessors, (2146), 1582 states have call successors, (2146) [2022-11-03 02:05:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 11821 transitions. [2022-11-03 02:05:16,992 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 11821 transitions. Word has length 178 [2022-11-03 02:05:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:16,992 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 11821 transitions. [2022-11-03 02:05:16,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2022-11-03 02:05:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 11821 transitions. [2022-11-03 02:05:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 02:05:17,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:17,014 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:17,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:17,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:05:17,230 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash -633347556, now seen corresponding path program 1 times [2022-11-03 02:05:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315212804] [2022-11-03 02:05:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:17,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 126 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 02:05:18,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:18,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315212804] [2022-11-03 02:05:18,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315212804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507557758] [2022-11-03 02:05:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:18,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:18,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:18,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:05:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:05:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 153 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:05:19,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:05:22,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507557758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745316424] [2022-11-03 02:05:22,031 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:05:22,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:05:22,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:05:22,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:05:22,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:05:29,155 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 82 for LOIs [2022-11-03 02:05:29,172 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 90 for LOIs [2022-11-03 02:05:29,593 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 55 for LOIs [2022-11-03 02:05:29,889 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-03 02:05:29,893 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:05:29,912 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 97 for LOIs [2022-11-03 02:05:30,726 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 62 for LOIs [2022-11-03 02:05:30,731 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 67 for LOIs [2022-11-03 02:05:30,735 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 63 for LOIs [2022-11-03 02:05:30,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:06:03,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237885#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~systemActive~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= 0 ~__SELECTED_FEATURE_methaneAlarm~0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= ~__SELECTED_FEATURE_methaneAlarm~0 0) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:06:03,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:06:03,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:06:03,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 48 [2022-11-03 02:06:03,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510244718] [2022-11-03 02:06:03,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:03,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:06:03,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:06:03,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=9616, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:06:03,398 INFO L87 Difference]: Start difference. First operand 9772 states and 11821 transitions. Second operand has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) [2022-11-03 02:06:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:16,733 INFO L93 Difference]: Finished difference Result 23383 states and 29660 transitions. [2022-11-03 02:06:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-03 02:06:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) Word has length 190 [2022-11-03 02:06:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:16,800 INFO L225 Difference]: With dead ends: 23383 [2022-11-03 02:06:16,800 INFO L226 Difference]: Without dead ends: 15667 [2022-11-03 02:06:16,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 518 SyntacticMatches, 34 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18708 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=3081, Invalid=33591, Unknown=0, NotChecked=0, Total=36672 [2022-11-03 02:06:16,825 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 4790 mSDsluCounter, 4203 mSDsCounter, 0 mSdLazyCounter, 8796 mSolverCounterSat, 3518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4797 SdHoareTripleChecker+Valid, 3818 SdHoareTripleChecker+Invalid, 12314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3518 IncrementalHoareTripleChecker+Valid, 8796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:16,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4797 Valid, 3818 Invalid, 12314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3518 Valid, 8796 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 02:06:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2022-11-03 02:06:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 11874. [2022-11-03 02:06:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11874 states, 8109 states have (on average 1.2092736465655445) internal successors, (9806), 8702 states have internal predecessors, (9806), 1923 states have call successors, (1923), 1819 states have call predecessors, (1923), 1841 states have return successors, (2707), 1825 states have call predecessors, (2707), 1923 states have call successors, (2707) [2022-11-03 02:06:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 14436 transitions. [2022-11-03 02:06:18,332 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 14436 transitions. Word has length 190 [2022-11-03 02:06:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:18,333 INFO L495 AbstractCegarLoop]: Abstraction has 11874 states and 14436 transitions. [2022-11-03 02:06:18,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) [2022-11-03 02:06:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 14436 transitions. [2022-11-03 02:06:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-03 02:06:18,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:18,356 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:18,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:06:18,570 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash 231449596, now seen corresponding path program 2 times [2022-11-03 02:06:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:18,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310778315] [2022-11-03 02:06:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:18,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-03 02:06:20,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310778315] [2022-11-03 02:06:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310778315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152082250] [2022-11-03 02:06:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:20,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:20,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:06:20,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:06:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:06:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 147 proven. 131 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:06:22,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 126 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:06:24,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152082250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:24,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612661718] [2022-11-03 02:06:24,682 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:06:24,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:24,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:24,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:24,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:36,186 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 60 for LOIs [2022-11-03 02:06:36,192 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 79 for LOIs [2022-11-03 02:06:36,812 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 78 for LOIs [2022-11-03 02:06:36,892 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-03 02:06:36,895 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2022-11-03 02:06:36,906 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 76 for LOIs [2022-11-03 02:06:37,266 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-03 02:06:37,275 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 78 for LOIs [2022-11-03 02:06:37,282 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-03 02:06:37,286 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:06,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '293044#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:07:06,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:07:06,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:07:06,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 22] total 67 [2022-11-03 02:07:06,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739045671] [2022-11-03 02:07:06,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:06,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:07:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:07:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=14199, Unknown=0, NotChecked=0, Total=15750 [2022-11-03 02:07:06,506 INFO L87 Difference]: Start difference. First operand 11874 states and 14436 transitions. Second operand has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 45 states have call successors, (79), 18 states have call predecessors, (79), 29 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) [2022-11-03 02:07:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:15,731 INFO L93 Difference]: Finished difference Result 21206 states and 25831 transitions. [2022-11-03 02:07:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-03 02:07:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 45 states have call successors, (79), 18 states have call predecessors, (79), 29 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) Word has length 217 [2022-11-03 02:07:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:15,738 INFO L225 Difference]: With dead ends: 21206 [2022-11-03 02:07:15,738 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:07:15,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 576 SyntacticMatches, 14 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16144 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=4306, Invalid=31604, Unknown=0, NotChecked=0, Total=35910 [2022-11-03 02:07:15,787 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 3119 mSDsluCounter, 3847 mSDsCounter, 0 mSdLazyCounter, 6856 mSolverCounterSat, 2348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3122 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 9204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2348 IncrementalHoareTripleChecker+Valid, 6856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:15,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3122 Valid, 3626 Invalid, 9204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2348 Valid, 6856 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:07:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:07:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:07:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:07:15,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2022-11-03 02:07:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:15,791 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:07:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 61 states have (on average 5.360655737704918) internal successors, (327), 63 states have internal predecessors, (327), 45 states have call successors, (79), 18 states have call predecessors, (79), 29 states have return successors, (85), 45 states have call predecessors, (85), 45 states have call successors, (85) [2022-11-03 02:07:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:07:15,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:07:15,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:07:15,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:16,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6566540e-9960-4518-9c1f-c13aa7240c95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:16,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 02:08:17,949 WARN L234 SmtUtils]: Spent 23.03s on a formula simplification. DAG size of input: 1005 DAG size of output: 856 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:09:06,413 WARN L234 SmtUtils]: Spent 46.56s on a formula simplification. DAG size of input: 1158 DAG size of output: 1121 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:10:18,243 WARN L234 SmtUtils]: Spent 45.14s on a formula simplification. DAG size of input: 498 DAG size of output: 429 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:11:39,270 WARN L234 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 1517 DAG size of output: 1286 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:11:51,356 WARN L234 SmtUtils]: Spent 9.57s on a formula simplification. DAG size of input: 845 DAG size of output: 698 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:12:19,480 WARN L234 SmtUtils]: Spent 24.51s on a formula simplification. DAG size of input: 1084 DAG size of output: 922 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:12:33,777 WARN L234 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 985 DAG size of output: 61 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:12:47,148 WARN L234 SmtUtils]: Spent 13.29s on a formula simplification. DAG size of input: 1032 DAG size of output: 104 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:13:19,288 WARN L234 SmtUtils]: Spent 31.99s on a formula simplification. DAG size of input: 1949 DAG size of output: 106 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:13:43,809 WARN L234 SmtUtils]: Spent 17.31s on a formula simplification. DAG size of input: 1093 DAG size of output: 79 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:14:15,753 WARN L234 SmtUtils]: Spent 31.85s on a formula simplification. DAG size of input: 1949 DAG size of output: 106 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:14:53,365 WARN L234 SmtUtils]: Spent 33.05s on a formula simplification. DAG size of input: 1927 DAG size of output: 115 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:15:06,784 WARN L234 SmtUtils]: Spent 13.35s on a formula simplification. DAG size of input: 1040 DAG size of output: 86 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)