./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 6b4ec56b 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_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/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_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 20:56:29,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:56:29,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:56:29,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:56:29,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:56:29,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:56:29,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:56:29,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:56:29,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:56:29,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:56:29,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:56:29,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:56:29,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:56:29,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:56:29,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:56:29,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:56:29,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:56:29,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:56:29,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:56:29,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:56:29,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:56:29,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:56:29,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:56:29,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:56:29,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:56:29,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:56:29,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:56:29,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:56:29,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:56:29,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:56:29,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:56:29,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:56:29,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:56:29,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:56:29,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:56:29,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:56:29,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:56:29,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:56:29,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:56:29,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:56:29,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:56:29,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:56:29,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:56:29,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:56:29,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:56:29,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:56:29,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:56:29,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:56:29,399 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:56:29,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:56:29,400 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:56:29,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:56:29,401 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:56:29,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:56:29,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:56:29,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:56:29,402 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:56:29,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:56:29,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:56:29,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:56:29,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:56:29,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:56:29,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:56:29,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:56:29,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:56:29,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:56:29,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:56:29,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:56:29,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:56:29,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:56:29,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:56:29,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:56:29,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:56:29,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:56:29,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:56:29,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:56:29,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:56:29,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:56:29,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:56:29,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:56:29,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:56:29,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:56:29,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:56:29,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2022-11-20 20:56:29,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:56:29,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:56:29,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:56:29,827 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:56:29,828 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:56:29,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-20 20:56:33,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:56:33,624 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:56:33,624 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-20 20:56:33,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/data/c34bfa0c9/bf7f2861b8534ee09c340bf33e849984/FLAGbc2d8070d [2022-11-20 20:56:33,670 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/data/c34bfa0c9/bf7f2861b8534ee09c340bf33e849984 [2022-11-20 20:56:33,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:56:33,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:56:33,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:56:33,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:56:33,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:56:33,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:56:33" (1/1) ... [2022-11-20 20:56:33,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d0352b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:33, skipping insertion in model container [2022-11-20 20:56:33,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:56:33" (1/1) ... [2022-11-20 20:56:33,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:56:33,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:56:33,966 WARN L237 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_d9f8184c-53be-4b83-b437-0f9497e84637/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-20 20:56:34,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:56:34,081 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:56:34,109 WARN L237 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_d9f8184c-53be-4b83-b437-0f9497e84637/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-20 20:56:34,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:56:34,185 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:56:34,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34 WrapperNode [2022-11-20 20:56:34,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:56:34,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:56:34,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:56:34,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:56:34,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,260 INFO L138 Inliner]: procedures = 65, calls = 124, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 300 [2022-11-20 20:56:34,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:56:34,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:56:34,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:56:34,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:56:34,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:56:34,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:56:34,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:56:34,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:56:34,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (1/1) ... [2022-11-20 20:56:34,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:56:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:56:34,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:56:34,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:56:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:56:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2022-11-20 20:56:34,431 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2022-11-20 20:56:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 20:56:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 20:56:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 20:56:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 20:56:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2022-11-20 20:56:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2022-11-20 20:56:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-20 20:56:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-20 20:56:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2022-11-20 20:56:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2022-11-20 20:56:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-11-20 20:56:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-11-20 20:56:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2022-11-20 20:56:34,434 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2022-11-20 20:56:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-20 20:56:34,434 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-20 20:56:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-20 20:56:34,434 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-20 20:56:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:56:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-11-20 20:56:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-11-20 20:56:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-20 20:56:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-20 20:56:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:56:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:56:34,546 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:56:34,550 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:56:35,097 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:56:35,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:56:35,251 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:56:35,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:56:35 BoogieIcfgContainer [2022-11-20 20:56:35,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:56:35,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:56:35,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:56:35,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:56:35,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:56:33" (1/3) ... [2022-11-20 20:56:35,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2416e5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:56:35, skipping insertion in model container [2022-11-20 20:56:35,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:56:34" (2/3) ... [2022-11-20 20:56:35,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2416e5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:56:35, skipping insertion in model container [2022-11-20 20:56:35,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:56:35" (3/3) ... [2022-11-20 20:56:35,267 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2022-11-20 20:56:35,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:56:35,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:56:35,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:56:35,375 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;@553908e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:56:35,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:56:35,382 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) [2022-11-20 20:56:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:56:35,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:35,403 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] [2022-11-20 20:56:35,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2022-11-20 20:56:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064428571] [2022-11-20 20:56:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:35,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:56:35,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064428571] [2022-11-20 20:56:35,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064428571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:35,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:35,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:56:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762915744] [2022-11-20 20:56:35,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:35,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:56:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:56:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:56:35,899 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) [2022-11-20 20:56:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:36,075 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2022-11-20 20:56:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:56:36,081 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 [2022-11-20 20:56:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:36,100 INFO L225 Difference]: With dead ends: 204 [2022-11-20 20:56:36,101 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 20:56:36,109 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 [2022-11-20 20:56:36,115 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 [2022-11-20 20:56:36,118 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] [2022-11-20 20:56:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 20:56:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 20:56:36,193 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) [2022-11-20 20:56:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2022-11-20 20:56:36,197 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2022-11-20 20:56:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:36,201 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2022-11-20 20:56:36,201 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) [2022-11-20 20:56:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2022-11-20 20:56:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 20:56:36,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:36,213 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] [2022-11-20 20:56:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:56:36,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2022-11-20 20:56:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:36,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188353299] [2022-11-20 20:56:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:56:36,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188353299] [2022-11-20 20:56:36,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188353299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:36,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:36,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:56:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305481577] [2022-11-20 20:56:36,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:56:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:56:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:56:36,491 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) [2022-11-20 20:56:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:36,588 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2022-11-20 20:56:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:56:36,590 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 [2022-11-20 20:56:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:36,592 INFO L225 Difference]: With dead ends: 167 [2022-11-20 20:56:36,592 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 20:56:36,593 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 [2022-11-20 20:56:36,595 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 20:56:36,596 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] [2022-11-20 20:56:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 20:56:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-20 20:56:36,610 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) [2022-11-20 20:56:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-11-20 20:56:36,612 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2022-11-20 20:56:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:36,612 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-11-20 20:56:36,613 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) [2022-11-20 20:56:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-11-20 20:56:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 20:56:36,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:36,615 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] [2022-11-20 20:56:36,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:56:36,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2022-11-20 20:56:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630618380] [2022-11-20 20:56:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:56:36,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:36,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630618380] [2022-11-20 20:56:36,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630618380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:36,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:36,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:56:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971616488] [2022-11-20 20:56:36,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:36,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:56:36,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:56:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:56:36,843 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) [2022-11-20 20:56:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:37,188 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-20 20:56:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:56:37,189 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 [2022-11-20 20:56:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:37,193 INFO L225 Difference]: With dead ends: 235 [2022-11-20 20:56:37,193 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 20:56:37,194 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 [2022-11-20 20:56:37,196 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 82 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:37,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 538 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:56:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 20:56:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-11-20 20:56:37,217 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) [2022-11-20 20:56:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2022-11-20 20:56:37,222 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2022-11-20 20:56:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:37,222 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2022-11-20 20:56:37,223 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) [2022-11-20 20:56:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2022-11-20 20:56:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 20:56:37,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:37,225 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] [2022-11-20 20:56:37,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:56:37,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2022-11-20 20:56:37,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:37,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683241845] [2022-11-20 20:56:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:56:37,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:37,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683241845] [2022-11-20 20:56:37,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683241845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:37,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:37,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:56:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152053841] [2022-11-20 20:56:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:37,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:56:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:56:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:56:37,785 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) [2022-11-20 20:56:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:38,153 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2022-11-20 20:56:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:56:38,154 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 [2022-11-20 20:56:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:38,168 INFO L225 Difference]: With dead ends: 421 [2022-11-20 20:56:38,169 INFO L226 Difference]: Without dead ends: 287 [2022-11-20 20:56:38,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:56:38,176 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 269 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 [2022-11-20 20:56:38,181 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] [2022-11-20 20:56:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-20 20:56:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-11-20 20:56:38,244 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) [2022-11-20 20:56:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-11-20 20:56:38,249 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2022-11-20 20:56:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:38,250 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-11-20 20:56:38,250 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) [2022-11-20 20:56:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-11-20 20:56:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:56:38,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:38,253 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] [2022-11-20 20:56:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:56:38,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2022-11-20 20:56:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334196669] [2022-11-20 20:56:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:56:38,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:38,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334196669] [2022-11-20 20:56:38,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334196669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:38,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:38,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:56:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011119367] [2022-11-20 20:56:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:56:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:56:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:56:38,730 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) [2022-11-20 20:56:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:39,665 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2022-11-20 20:56:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:56:39,666 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 [2022-11-20 20:56:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:39,671 INFO L225 Difference]: With dead ends: 593 [2022-11-20 20:56:39,671 INFO L226 Difference]: Without dead ends: 420 [2022-11-20 20:56:39,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:56:39,677 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 422 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:39,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 371 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:56:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-20 20:56:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2022-11-20 20:56:39,750 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) [2022-11-20 20:56:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-11-20 20:56:39,753 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2022-11-20 20:56:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:39,753 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-11-20 20:56:39,753 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) [2022-11-20 20:56:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-11-20 20:56:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 20:56:39,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:39,755 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] [2022-11-20 20:56:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:56:39,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2022-11-20 20:56:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744934468] [2022-11-20 20:56:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 20:56:39,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:39,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744934468] [2022-11-20 20:56:39,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744934468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:39,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:39,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:56:39,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012263066] [2022-11-20 20:56:39,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:56:39,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:56:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:56:39,912 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) [2022-11-20 20:56:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:40,711 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2022-11-20 20:56:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:56:40,712 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 [2022-11-20 20:56:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:40,716 INFO L225 Difference]: With dead ends: 802 [2022-11-20 20:56:40,716 INFO L226 Difference]: Without dead ends: 608 [2022-11-20 20:56:40,718 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 [2022-11-20 20:56:40,719 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 199 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:40,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 804 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:56:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-20 20:56:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2022-11-20 20:56:40,786 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) [2022-11-20 20:56:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2022-11-20 20:56:40,790 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2022-11-20 20:56:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:40,791 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2022-11-20 20:56:40,791 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) [2022-11-20 20:56:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2022-11-20 20:56:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 20:56:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:40,795 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] [2022-11-20 20:56:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:56:40,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2022-11-20 20:56:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227139953] [2022-11-20 20:56:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:40,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 20:56:40,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:40,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227139953] [2022-11-20 20:56:40,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227139953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:56:40,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553791553] [2022-11-20 20:56:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:40,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:56:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:56:40,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:56:40,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:56:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:56:41,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:56:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:56:41,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:56:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 20:56:41,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553791553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:56:41,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940339037] [2022-11-20 20:56:41,689 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-20 20:56:41,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:56:41,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:56:41,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:56:41,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:56:47,159 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 89 for LOIs [2022-11-20 20:56:47,177 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-20 20:56:47,917 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-20 20:56:48,069 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-20 20:56:48,082 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 20:56:48,101 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 77 for LOIs [2022-11-20 20:56:48,462 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-20 20:56:48,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:57:01,439 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) (<= |old(~pumpRunning~0)| 2147483647) (= 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) (<= 2 |old(~waterLevel~0)|) (<= ~__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 [2022-11-20 20:57:01,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:57:01,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:57:01,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-11-20 20:57:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518333872] [2022-11-20 20:57:01,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:57:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:57:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:57:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 20:57:01,443 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) [2022-11-20 20:57:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:02,595 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2022-11-20 20:57:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 20:57:02,596 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 [2022-11-20 20:57:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:02,603 INFO L225 Difference]: With dead ends: 1099 [2022-11-20 20:57:02,604 INFO L226 Difference]: Without dead ends: 632 [2022-11-20 20:57:02,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=421, Invalid=4549, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 20:57:02,609 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 257 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:02,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1017 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:57:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-20 20:57:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2022-11-20 20:57:02,664 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) [2022-11-20 20:57:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2022-11-20 20:57:02,669 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2022-11-20 20:57:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:02,670 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2022-11-20 20:57:02,670 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) [2022-11-20 20:57:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2022-11-20 20:57:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 20:57:02,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:02,674 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] [2022-11-20 20:57:02,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:02,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2022-11-20 20:57:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120764712] [2022-11-20 20:57:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 20:57:03,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120764712] [2022-11-20 20:57:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120764712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984964380] [2022-11-20 20:57:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:03,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:03,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:03,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:57:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:57:03,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 20:57:03,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:57:03,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984964380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:03,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:03,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-20 20:57:03,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245470792] [2022-11-20 20:57:03,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:57:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:57:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:57:03,295 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) [2022-11-20 20:57:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:03,398 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2022-11-20 20:57:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:57:03,399 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 [2022-11-20 20:57:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:03,403 INFO L225 Difference]: With dead ends: 1222 [2022-11-20 20:57:03,404 INFO L226 Difference]: Without dead ends: 714 [2022-11-20 20:57:03,406 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 [2022-11-20 20:57:03,409 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 113 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 [2022-11-20 20:57:03,409 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] [2022-11-20 20:57:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-20 20:57:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2022-11-20 20:57:03,471 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) [2022-11-20 20:57:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2022-11-20 20:57:03,476 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2022-11-20 20:57:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:03,477 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2022-11-20 20:57:03,478 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) [2022-11-20 20:57:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2022-11-20 20:57:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 20:57:03,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:03,485 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] [2022-11-20 20:57:03,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 20:57:03,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:03,691 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2022-11-20 20:57:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:03,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205264150] [2022-11-20 20:57:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 20:57:03,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:03,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205264150] [2022-11-20 20:57:03,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205264150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469411745] [2022-11-20 20:57:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:57:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:03,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:57:04,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:57:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:57:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 20:57:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:57:04,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:57:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-20 20:57:04,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469411745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:57:04,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441800358] [2022-11-20 20:57:04,732 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-20 20:57:04,732 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:57:04,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:57:04,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:57:04,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:57:13,464 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 84 for LOIs [2022-11-20 20:57:13,474 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 81 for LOIs [2022-11-20 20:57:14,214 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 80 for LOIs [2022-11-20 20:57:14,332 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2022-11-20 20:57:14,338 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 20:57:14,351 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 78 for LOIs [2022-11-20 20:57:14,575 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-20 20:57:14,585 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-20 20:57:14,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:57:32,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13777#(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 [2022-11-20 20:57:32,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:57:32,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:57:32,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-20 20:57:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636781748] [2022-11-20 20:57:32,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:57:32,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:57:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:57:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=5660, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 20:57:32,939 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) [2022-11-20 20:57:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:38,932 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2022-11-20 20:57:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 20:57:38,933 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 [2022-11-20 20:57:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:38,942 INFO L225 Difference]: With dead ends: 2312 [2022-11-20 20:57:38,942 INFO L226 Difference]: Without dead ends: 1655 [2022-11-20 20:57:38,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 404 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10466 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1948, Invalid=23812, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 20:57:38,951 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1686 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:38,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 2558 Invalid, 5197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1464 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 20:57:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-20 20:57:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2022-11-20 20:57:39,082 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) [2022-11-20 20:57:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2022-11-20 20:57:39,088 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2022-11-20 20:57:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:39,089 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2022-11-20 20:57:39,089 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) [2022-11-20 20:57:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2022-11-20 20:57:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 20:57:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:39,094 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] [2022-11-20 20:57:39,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:39,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 20:57:39,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2022-11-20 20:57:39,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227066565] [2022-11-20 20:57:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 20:57:39,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:39,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227066565] [2022-11-20 20:57:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227066565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:39,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928358266] [2022-11-20 20:57:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:39,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:39,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:39,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:39,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:57:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:57:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 20:57:39,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:57:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928358266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:39,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:39,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 20:57:39,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102390699] [2022-11-20 20:57:39,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:39,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:57:39,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:39,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:57:39,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:57:39,570 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) [2022-11-20 20:57:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:39,796 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2022-11-20 20:57:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:57:39,797 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 [2022-11-20 20:57:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:39,808 INFO L225 Difference]: With dead ends: 3011 [2022-11-20 20:57:39,808 INFO L226 Difference]: Without dead ends: 1940 [2022-11-20 20:57:39,813 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 [2022-11-20 20:57:39,814 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 73 mSDsluCounter, 99 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 [2022-11-20 20:57:39,815 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] [2022-11-20 20:57:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-20 20:57:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2022-11-20 20:57:40,057 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) [2022-11-20 20:57:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2022-11-20 20:57:40,066 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2022-11-20 20:57:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:40,067 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2022-11-20 20:57:40,067 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) [2022-11-20 20:57:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2022-11-20 20:57:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:57:40,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:40,074 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 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] [2022-11-20 20:57:40,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:40,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1929748545, now seen corresponding path program 1 times [2022-11-20 20:57:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027992553] [2022-11-20 20:57:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 20:57:40,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027992553] [2022-11-20 20:57:40,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027992553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336801630] [2022-11-20 20:57:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:40,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:40,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:40,359 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:40,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:57:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:57:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 20:57:40,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:57:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336801630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:40,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:40,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 20:57:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042799096] [2022-11-20 20:57:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:57:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:57:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:57:40,575 INFO L87 Difference]: Start difference. First operand 1911 states and 2478 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-20 20:57:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:40,818 INFO L93 Difference]: Finished difference Result 3059 states and 3946 transitions. [2022-11-20 20:57:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:57:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 143 [2022-11-20 20:57:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:40,831 INFO L225 Difference]: With dead ends: 3059 [2022-11-20 20:57:40,831 INFO L226 Difference]: Without dead ends: 2060 [2022-11-20 20:57:40,835 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 [2022-11-20 20:57:40,836 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 71 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 294 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 [2022-11-20 20:57:40,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 294 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:57:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-11-20 20:57:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1999. [2022-11-20 20:57:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1331 states have (on average 1.2516904583020285) internal successors, (1666), 1486 states have internal predecessors, (1666), 349 states have call successors, (349), 287 states have call predecessors, (349), 318 states have return successors, (517), 348 states have call predecessors, (517), 349 states have call successors, (517) [2022-11-20 20:57:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 2532 transitions. [2022-11-20 20:57:41,114 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 2532 transitions. Word has length 143 [2022-11-20 20:57:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:41,114 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 2532 transitions. [2022-11-20 20:57:41,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-20 20:57:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 2532 transitions. [2022-11-20 20:57:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 20:57:41,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:41,122 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] [2022-11-20 20:57:41,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:41,329 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2022-11-20 20:57:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:41,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327652077] [2022-11-20 20:57:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 20:57:41,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327652077] [2022-11-20 20:57:41,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327652077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517704375] [2022-11-20 20:57:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:41,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:41,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:41,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:57:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:57:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 20:57:41,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:57:41,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517704375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:41,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:41,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 20:57:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035896118] [2022-11-20 20:57:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:41,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:57:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:57:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:57:41,612 INFO L87 Difference]: Start difference. First operand 1999 states and 2532 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) [2022-11-20 20:57:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:42,016 INFO L93 Difference]: Finished difference Result 5343 states and 6957 transitions. [2022-11-20 20:57:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:57:42,017 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 [2022-11-20 20:57:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:42,040 INFO L225 Difference]: With dead ends: 5343 [2022-11-20 20:57:42,041 INFO L226 Difference]: Without dead ends: 3509 [2022-11-20 20:57:42,047 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 [2022-11-20 20:57:42,048 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 72 mSDsluCounter, 105 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:42,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:57:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-11-20 20:57:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 3489. [2022-11-20 20:57:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2341 states have (on average 1.243912857753097) internal successors, (2912), 2594 states have internal predecessors, (2912), 589 states have call successors, (589), 510 states have call predecessors, (589), 558 states have return successors, (966), 576 states have call predecessors, (966), 589 states have call successors, (966) [2022-11-20 20:57:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4467 transitions. [2022-11-20 20:57:42,474 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4467 transitions. Word has length 141 [2022-11-20 20:57:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:42,475 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4467 transitions. [2022-11-20 20:57:42,475 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) [2022-11-20 20:57:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4467 transitions. [2022-11-20 20:57:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:57:42,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:42,487 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] [2022-11-20 20:57:42,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 20:57:42,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:42,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2022-11-20 20:57:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:42,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40508763] [2022-11-20 20:57:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:42,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:57:42,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:42,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40508763] [2022-11-20 20:57:42,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40508763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291707734] [2022-11-20 20:57:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:42,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:42,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:42,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:57:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:57:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 20:57:43,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:57:43,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291707734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:43,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:43,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 20:57:43,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342747416] [2022-11-20 20:57:43,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:57:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:57:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:57:43,055 INFO L87 Difference]: Start difference. First operand 3489 states and 4467 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) [2022-11-20 20:57:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:43,361 INFO L93 Difference]: Finished difference Result 5158 states and 6533 transitions. [2022-11-20 20:57:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:57:43,361 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 [2022-11-20 20:57:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:43,382 INFO L225 Difference]: With dead ends: 5158 [2022-11-20 20:57:43,382 INFO L226 Difference]: Without dead ends: 3506 [2022-11-20 20:57:43,389 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 [2022-11-20 20:57:43,390 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 62 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:43,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:57:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-11-20 20:57:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3448. [2022-11-20 20:57:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 2311 states have (on average 1.2397230636088274) internal successors, (2865), 2563 states have internal predecessors, (2865), 584 states have call successors, (584), 508 states have call predecessors, (584), 552 states have return successors, (843), 566 states have call predecessors, (843), 584 states have call successors, (843) [2022-11-20 20:57:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4292 transitions. [2022-11-20 20:57:43,973 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4292 transitions. Word has length 143 [2022-11-20 20:57:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:43,976 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4292 transitions. [2022-11-20 20:57:43,976 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) [2022-11-20 20:57:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4292 transitions. [2022-11-20 20:57:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-20 20:57:43,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:43,987 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 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] [2022-11-20 20:57:43,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:57:44,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:44,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1794741770, now seen corresponding path program 1 times [2022-11-20 20:57:44,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767075061] [2022-11-20 20:57:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:44,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 20:57:44,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767075061] [2022-11-20 20:57:44,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767075061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:44,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:57:44,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:57:44,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277867821] [2022-11-20 20:57:44,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:44,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:57:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:57:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:57:44,339 INFO L87 Difference]: Start difference. First operand 3448 states and 4292 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-20 20:57:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:45,408 INFO L93 Difference]: Finished difference Result 7651 states and 9569 transitions. [2022-11-20 20:57:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:57:45,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 145 [2022-11-20 20:57:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:45,444 INFO L225 Difference]: With dead ends: 7651 [2022-11-20 20:57:45,444 INFO L226 Difference]: Without dead ends: 6608 [2022-11-20 20:57:45,451 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 [2022-11-20 20:57:45,452 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 218 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:45,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 701 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:57:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2022-11-20 20:57:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 5499. [2022-11-20 20:57:46,264 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) [2022-11-20 20:57:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2022-11-20 20:57:46,374 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 145 [2022-11-20 20:57:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2022-11-20 20:57:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-20 20:57:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2022-11-20 20:57:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-20 20:57:46,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:46,395 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] [2022-11-20 20:57:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:57:46,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2022-11-20 20:57:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818956400] [2022-11-20 20:57:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:46,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 20:57:47,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818956400] [2022-11-20 20:57:47,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818956400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879806696] [2022-11-20 20:57:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:47,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:47,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:57:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 20:57:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:57:48,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:57:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 20:57:49,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879806696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:57:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362028232] [2022-11-20 20:57:49,760 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-20 20:57:49,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:57:49,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:57:49,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:57:49,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:57:55,441 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 85 for LOIs [2022-11-20 20:57:55,454 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-20 20:57:56,311 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 84 for LOIs [2022-11-20 20:57:56,710 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-20 20:57:56,718 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 20:57:56,731 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 81 for LOIs [2022-11-20 20:57:56,982 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 85 for LOIs [2022-11-20 20:57:56,992 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-20 20:57:57,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:58:14,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83794#(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)|) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 1) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~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|) (= ~__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|) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 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 [2022-11-20 20:58:14,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:58:14,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:58:14,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 11] total 35 [2022-11-20 20:58:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205352302] [2022-11-20 20:58:14,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:58:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 20:58:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:58:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 20:58:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=6875, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 20:58:14,097 INFO L87 Difference]: Start difference. First operand 5499 states and 6829 transitions. Second operand has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) [2022-11-20 20:58:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:58:21,552 INFO L93 Difference]: Finished difference Result 14935 states and 19704 transitions. [2022-11-20 20:58:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 20:58:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) Word has length 145 [2022-11-20 20:58:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:58:21,615 INFO L225 Difference]: With dead ends: 14935 [2022-11-20 20:58:21,616 INFO L226 Difference]: Without dead ends: 12106 [2022-11-20 20:58:21,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 390 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10142 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1831, Invalid=19925, Unknown=0, NotChecked=0, Total=21756 [2022-11-20 20:58:21,635 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 3431 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 4679 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 6792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 4679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:58:21,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 1654 Invalid, 6792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 4679 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 20:58:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2022-11-20 20:58:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 8228. [2022-11-20 20:58:22,856 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) [2022-11-20 20:58:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 10137 transitions. [2022-11-20 20:58:22,883 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 10137 transitions. Word has length 145 [2022-11-20 20:58:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:58:22,883 INFO L495 AbstractCegarLoop]: Abstraction has 8228 states and 10137 transitions. [2022-11-20 20:58:22,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) [2022-11-20 20:58:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 10137 transitions. [2022-11-20 20:58:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-20 20:58:22,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:58:22,910 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] [2022-11-20 20:58:22,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:58:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 20:58:23,116 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:58:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:58:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2022-11-20 20:58:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:58:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235434573] [2022-11-20 20:58:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:58:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:58:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:58:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-20 20:58:23,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:58:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235434573] [2022-11-20 20:58:23,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235434573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:58:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582223529] [2022-11-20 20:58:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:58:23,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:58:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:58:23,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:58:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:58:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:58:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:58:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:58:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 20:58:23,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:58:23,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582223529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:58:23,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:58:23,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 20:58:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720495690] [2022-11-20 20:58:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:58:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:58:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:58:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:58:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:58:23,417 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) [2022-11-20 20:58:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:58:24,671 INFO L93 Difference]: Finished difference Result 17695 states and 22202 transitions. [2022-11-20 20:58:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:58:24,672 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 [2022-11-20 20:58:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:58:24,720 INFO L225 Difference]: With dead ends: 17695 [2022-11-20 20:58:24,721 INFO L226 Difference]: Without dead ends: 9795 [2022-11-20 20:58:24,748 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 [2022-11-20 20:58:24,749 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 68 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 [2022-11-20 20:58:24,749 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] [2022-11-20 20:58:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2022-11-20 20:58:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9747. [2022-11-20 20:58:25,985 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) [2022-11-20 20:58:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 12046 transitions. [2022-11-20 20:58:26,016 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 12046 transitions. Word has length 175 [2022-11-20 20:58:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:58:26,017 INFO L495 AbstractCegarLoop]: Abstraction has 9747 states and 12046 transitions. [2022-11-20 20:58:26,017 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) [2022-11-20 20:58:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 12046 transitions. [2022-11-20 20:58:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-20 20:58:26,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:58:26,047 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] [2022-11-20 20:58:26,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:58:26,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:58:26,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:58:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:58:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2022-11-20 20:58:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:58:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512904928] [2022-11-20 20:58:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:58:26,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:58:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:58:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 20:58:27,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:58:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512904928] [2022-11-20 20:58:27,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512904928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:58:27,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319198187] [2022-11-20 20:58:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:58:27,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:58:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:58:27,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:58:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:58:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:58:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 20:58:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:58:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 20:58:28,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:58:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:58:30,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319198187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:58:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909002041] [2022-11-20 20:58:30,731 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-20 20:58:30,731 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:58:30,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:58:30,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:58:30,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:58:39,262 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 80 for LOIs [2022-11-20 20:58:39,276 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-20 20:58:39,631 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-20 20:58:39,684 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-20 20:58:39,686 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 20:58:39,699 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-20 20:58:39,942 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-20 20:58:39,947 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-20 20:58:39,952 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-20 20:58:39,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:59:00,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162472#(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 [2022-11-20 20:59:00,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:59:00,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:59:00,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 40 [2022-11-20 20:59:00,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305178019] [2022-11-20 20:59:00,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:59:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:59:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:59:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=9263, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 20:59:00,713 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) [2022-11-20 20:59:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:09,018 INFO L93 Difference]: Finished difference Result 18229 states and 22391 transitions. [2022-11-20 20:59:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 20:59:09,018 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 [2022-11-20 20:59:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:09,059 INFO L225 Difference]: With dead ends: 18229 [2022-11-20 20:59:09,060 INFO L226 Difference]: Without dead ends: 9940 [2022-11-20 20:59:09,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 475 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9602 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=1810, Invalid=20242, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 20:59:09,089 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 2855 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 4782 mSolverCounterSat, 2015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 6797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2015 IncrementalHoareTripleChecker+Valid, 4782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:09,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 2256 Invalid, 6797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2015 Valid, 4782 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 20:59:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-11-20 20:59:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9772. [2022-11-20 20:59:10,487 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) [2022-11-20 20:59:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 11821 transitions. [2022-11-20 20:59:10,523 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 11821 transitions. Word has length 178 [2022-11-20 20:59:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:10,524 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 11821 transitions. [2022-11-20 20:59:10,524 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) [2022-11-20 20:59:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 11821 transitions. [2022-11-20 20:59:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-20 20:59:10,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:10,550 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] [2022-11-20 20:59:10,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:59:10,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:59:10,756 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash -633347556, now seen corresponding path program 1 times [2022-11-20 20:59:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:10,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254696000] [2022-11-20 20:59:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 126 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:59:12,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254696000] [2022-11-20 20:59:12,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254696000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:59:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892852265] [2022-11-20 20:59:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:12,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:59:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:59:12,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:59:12,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:59:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 20:59:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:59:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 153 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 20:59:13,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:59:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 20:59:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892852265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:59:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542910602] [2022-11-20 20:59:16,321 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-20 20:59:16,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:59:16,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:59:16,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:59:16,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:59:20,533 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 83 for LOIs [2022-11-20 20:59:20,543 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 64 for LOIs [2022-11-20 20:59:20,935 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-20 20:59:21,402 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 72 for LOIs [2022-11-20 20:59:21,411 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 20:59:21,423 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 85 for LOIs [2022-11-20 20:59:21,819 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 84 for LOIs [2022-11-20 20:59:21,828 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 84 for LOIs [2022-11-20 20:59:21,843 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-20 20:59:21,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:59:43,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '206403#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~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|) (= ~__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|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 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 [2022-11-20 20:59:43,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:59:43,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:59:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 48 [2022-11-20 20:59:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717520191] [2022-11-20 20:59:43,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:59:43,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 20:59:43,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 20:59:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=10090, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 20:59:43,580 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) [2022-11-20 20:59:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:58,745 INFO L93 Difference]: Finished difference Result 23383 states and 29660 transitions. [2022-11-20 20:59:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 20:59:58,746 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 [2022-11-20 20:59:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:58,817 INFO L225 Difference]: With dead ends: 23383 [2022-11-20 20:59:58,817 INFO L226 Difference]: Without dead ends: 15667 [2022-11-20 20:59:58,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 532 SyntacticMatches, 18 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17158 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=3021, Invalid=34421, Unknown=0, NotChecked=0, Total=37442 [2022-11-20 20:59:58,846 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 5761 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 8285 mSolverCounterSat, 4272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5768 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 12557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4272 IncrementalHoareTripleChecker+Valid, 8285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:58,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5768 Valid, 3393 Invalid, 12557 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4272 Valid, 8285 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-20 20:59:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2022-11-20 21:00:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 11874. [2022-11-20 21:00:00,621 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) [2022-11-20 21:00:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 14436 transitions. [2022-11-20 21:00:00,661 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 14436 transitions. Word has length 190 [2022-11-20 21:00:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:00,661 INFO L495 AbstractCegarLoop]: Abstraction has 11874 states and 14436 transitions. [2022-11-20 21:00:00,662 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) [2022-11-20 21:00:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 14436 transitions. [2022-11-20 21:00:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-20 21:00:00,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:00,694 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] [2022-11-20 21:00:00,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:00:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:00:00,909 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 231449596, now seen corresponding path program 2 times [2022-11-20 21:00:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:00,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106177409] [2022-11-20 21:00:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-20 21:00:03,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106177409] [2022-11-20 21:00:03,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106177409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380561740] [2022-11-20 21:00:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:00:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:03,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:03,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:00:03,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:00:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:00:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 21:00:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 149 proven. 149 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 21:00:05,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:00:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 133 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-20 21:00:08,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380561740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:00:08,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140681059] [2022-11-20 21:00:08,911 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-20 21:00:08,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:00:08,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:00:08,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:00:08,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:00:20,391 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 60 for LOIs [2022-11-20 21:00:20,400 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-20 21:00:20,838 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-20 21:00:20,908 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-20 21:00:20,912 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-20 21:00:20,928 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-20 21:00:21,230 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-20 21:00:21,236 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-20 21:00:21,240 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-20 21:00:21,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:00:46,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '261568#(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 [2022-11-20 21:00:46,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:00:46,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:00:46,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 25] total 71 [2022-11-20 21:00:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177480086] [2022-11-20 21:00:46,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:00:46,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 21:00:46,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 21:00:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1754, Invalid=15538, Unknown=0, NotChecked=0, Total=17292 [2022-11-20 21:00:46,161 INFO L87 Difference]: Start difference. First operand 11874 states and 14436 transitions. Second operand has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) [2022-11-20 21:01:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:01,050 INFO L93 Difference]: Finished difference Result 21672 states and 26499 transitions. [2022-11-20 21:01:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 21:01:01,052 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) Word has length 217 [2022-11-20 21:01:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:01,060 INFO L225 Difference]: With dead ends: 21672 [2022-11-20 21:01:01,060 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 21:01:01,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 590 SyntacticMatches, 11 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22179 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=6630, Invalid=47426, Unknown=0, NotChecked=0, Total=54056 [2022-11-20 21:01:01,104 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 5364 mSDsluCounter, 3919 mSDsCounter, 0 mSdLazyCounter, 8431 mSolverCounterSat, 3705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5364 SdHoareTripleChecker+Valid, 4191 SdHoareTripleChecker+Invalid, 12136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3705 IncrementalHoareTripleChecker+Valid, 8431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:01,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5364 Valid, 4191 Invalid, 12136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3705 Valid, 8431 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-20 21:01:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 21:01:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 21:01:01,105 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) [2022-11-20 21:01:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 21:01:01,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2022-11-20 21:01:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:01,108 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 21:01:01,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) [2022-11-20 21:01:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 21:01:01,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 21:01:01,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:01:01,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 21:01:01,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f8184c-53be-4b83-b437-0f9497e84637/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:01,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 21:02:17,229 WARN L233 SmtUtils]: Spent 28.71s on a formula simplification. DAG size of input: 1043 DAG size of output: 900 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:03:07,663 WARN L233 SmtUtils]: Spent 48.28s on a formula simplification. DAG size of input: 1167 DAG size of output: 1130 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:04:35,828 WARN L233 SmtUtils]: Spent 58.17s on a formula simplification. DAG size of input: 539 DAG size of output: 472 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:06:37,981 WARN L233 SmtUtils]: Spent 2.02m on a formula simplification. DAG size of input: 1576 DAG size of output: 1353 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:06:51,602 WARN L233 SmtUtils]: Spent 10.85s on a formula simplification. DAG size of input: 860 DAG size of output: 719 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:07:28,110 WARN L233 SmtUtils]: Spent 32.51s on a formula simplification. DAG size of input: 1117 DAG size of output: 963 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 21:07:46,083 WARN L233 SmtUtils]: Spent 15.05s on a formula simplification. DAG size of input: 1070 DAG size of output: 74 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 21:08:03,400 WARN L233 SmtUtils]: Spent 17.22s on a formula simplification. DAG size of input: 1118 DAG size of output: 92 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 21:08:40,748 WARN L233 SmtUtils]: Spent 37.16s on a formula simplification. DAG size of input: 2052 DAG size of output: 143 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 21:09:10,321 WARN L233 SmtUtils]: Spent 21.69s on a formula simplification. DAG size of input: 1165 DAG size of output: 93 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 21:09:47,569 WARN L233 SmtUtils]: Spent 37.14s on a formula simplification. DAG size of input: 2052 DAG size of output: 143 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)