./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:00:57,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:00:57,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:00:57,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:00:57,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:00:57,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:00:57,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:00:57,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:00:57,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:00:57,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:00:57,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:00:57,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:00:57,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:00:57,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:00:57,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:00:57,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:00:57,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:00:57,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:00:57,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:00:57,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:00:57,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:00:57,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:00:57,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:00:57,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:00:57,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:00:57,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:00:57,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:00:57,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:00:57,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:00:57,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:00:57,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:00:57,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:00:57,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:00:57,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:00:57,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:00:57,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:00:57,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:00:57,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:00:57,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:00:57,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:00:57,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:00:57,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:00:57,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:00:57,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:00:57,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:00:57,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:00:57,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:00:57,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:00:57,495 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:00:57,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:00:57,496 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:00:57,496 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:00:57,497 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:00:57,497 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:00:57,497 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:00:57,498 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:00:57,498 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:00:57,498 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:00:57,498 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:00:57,498 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:00:57,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:00:57,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:00:57,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:00:57,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:00:57,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:00:57,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:00:57,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:00:57,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:00:57,501 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:00:57,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:00:57,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:00:57,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:00:57,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:00:57,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:00:57,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:57,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:00:57,503 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:00:57,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:00:57,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:00:57,503 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:00:57,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:00:57,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:00:57,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:00:57,504 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_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 [2022-11-19 08:00:57,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:00:57,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:00:57,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:00:57,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:00:57,883 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:00:57,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2022-11-19 08:00:57,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/data/71834581a/b041b44c837e47508a1ec4216de57f59/FLAG3875070a6 [2022-11-19 08:00:58,463 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:00:58,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2022-11-19 08:00:58,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/data/71834581a/b041b44c837e47508a1ec4216de57f59/FLAG3875070a6 [2022-11-19 08:00:58,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/data/71834581a/b041b44c837e47508a1ec4216de57f59 [2022-11-19 08:00:58,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:00:58,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:00:58,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:58,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:00:58,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:00:58,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:58" (1/1) ... [2022-11-19 08:00:58,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39309b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:58, skipping insertion in model container [2022-11-19 08:00:58,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:58" (1/1) ... [2022-11-19 08:00:58,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:00:58,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:00:59,099 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2022-11-19 08:00:59,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:59,192 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:00:59,209 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2022-11-19 08:00:59,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:59,303 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:00:59,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59 WrapperNode [2022-11-19 08:00:59,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:59,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:59,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:00:59,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:00:59,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,370 INFO L138 Inliner]: procedures = 59, calls = 107, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 241 [2022-11-19 08:00:59,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:59,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:00:59,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:00:59,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:00:59,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:00:59,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:00:59,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:00:59,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:00:59,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (1/1) ... [2022-11-19 08:00:59,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:59,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:00:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:00:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:00:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-19 08:00:59,518 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-19 08:00:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:00:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:00:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:00:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:00:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-11-19 08:00:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-11-19 08:00:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 08:00:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 08:00:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-11-19 08:00:59,520 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-11-19 08:00:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-19 08:00:59,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-19 08:00:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-19 08:00:59,521 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-19 08:00:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:00:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 08:00:59,522 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 08:00:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:00:59,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:00:59,649 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:00:59,653 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:01:00,026 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:01:00,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:01:00,166 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:01:00,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:00 BoogieIcfgContainer [2022-11-19 08:01:00,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:01:00,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:01:00,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:01:00,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:01:00,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:58" (1/3) ... [2022-11-19 08:01:00,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a4f8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:00, skipping insertion in model container [2022-11-19 08:01:00,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:59" (2/3) ... [2022-11-19 08:01:00,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a4f8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:00, skipping insertion in model container [2022-11-19 08:01:00,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:00" (3/3) ... [2022-11-19 08:01:00,182 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product64.cil.c [2022-11-19 08:01:00,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:01:00,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:01:00,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:01:00,272 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;@538179f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:01:00,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:01:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 08:01:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:01:00,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:00,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:00,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash 758216112, now seen corresponding path program 1 times [2022-11-19 08:01:00,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:00,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230755453] [2022-11-19 08:01:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:00,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:00,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230755453] [2022-11-19 08:01:00,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230755453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:00,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:00,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:01:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818837878] [2022-11-19 08:01:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:00,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:01:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:01:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:01:00,516 INFO L87 Difference]: Start difference. First operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:00,663 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2022-11-19 08:01:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:01:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:01:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:00,676 INFO L225 Difference]: With dead ends: 144 [2022-11-19 08:01:00,676 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 08:01:00,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:01:00,683 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:00,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 08:01:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 08:01:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 52 states have internal predecessors, (57), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 08:01:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-11-19 08:01:00,742 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 12 [2022-11-19 08:01:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:00,743 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-11-19 08:01:00,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-11-19 08:01:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:01:00,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:00,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:00,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:01:00,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1790501731, now seen corresponding path program 1 times [2022-11-19 08:01:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229462602] [2022-11-19 08:01:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:00,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229462602] [2022-11-19 08:01:00,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229462602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:00,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:00,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105885114] [2022-11-19 08:01:00,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:00,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:00,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:00,898 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:00,959 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-11-19 08:01:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:00,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:01:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:00,962 INFO L225 Difference]: With dead ends: 108 [2022-11-19 08:01:00,962 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 08:01:00,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:00,964 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:00,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 110 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:01:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 08:01:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-19 08:01:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 47 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 08:01:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2022-11-19 08:01:00,977 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2022-11-19 08:01:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:00,977 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2022-11-19 08:01:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2022-11-19 08:01:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:01:00,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:00,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:01:00,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -760101963, now seen corresponding path program 1 times [2022-11-19 08:01:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296750949] [2022-11-19 08:01:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:01,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296750949] [2022-11-19 08:01:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296750949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:01,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774028931] [2022-11-19 08:01:01,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:01,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:01,157 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:01,258 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2022-11-19 08:01:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:01:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:01,261 INFO L225 Difference]: With dead ends: 147 [2022-11-19 08:01:01,261 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 08:01:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:01,263 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:01,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 08:01:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-19 08:01:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (19), 12 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 08:01:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2022-11-19 08:01:01,284 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 16 [2022-11-19 08:01:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:01,284 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2022-11-19 08:01:01,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2022-11-19 08:01:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:01:01,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:01,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:01,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:01:01,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1260589856, now seen corresponding path program 1 times [2022-11-19 08:01:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37345477] [2022-11-19 08:01:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:01,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37345477] [2022-11-19 08:01:01,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37345477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:01,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:01,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487272793] [2022-11-19 08:01:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:01,393 INFO L87 Difference]: Start difference. First operand 86 states and 113 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:01,489 INFO L93 Difference]: Finished difference Result 210 states and 287 transitions. [2022-11-19 08:01:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:01:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:01,492 INFO L225 Difference]: With dead ends: 210 [2022-11-19 08:01:01,492 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 08:01:01,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:01,495 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:01,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 177 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 08:01:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2022-11-19 08:01:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.3) internal successors, (104), 91 states have internal predecessors, (104), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-19 08:01:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2022-11-19 08:01:01,517 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 19 [2022-11-19 08:01:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:01,518 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2022-11-19 08:01:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2022-11-19 08:01:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:01:01,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:01,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:01,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:01:01,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 291838580, now seen corresponding path program 1 times [2022-11-19 08:01:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:01,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823794070] [2022-11-19 08:01:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:01,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:01,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823794070] [2022-11-19 08:01:01,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823794070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:01,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:01,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:01:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116562130] [2022-11-19 08:01:01,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:01:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:01:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:01,739 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:01:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:01,890 INFO L93 Difference]: Finished difference Result 351 states and 455 transitions. [2022-11-19 08:01:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:01:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-11-19 08:01:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:01,893 INFO L225 Difference]: With dead ends: 351 [2022-11-19 08:01:01,893 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 08:01:01,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:01:01,896 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:01,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 217 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 08:01:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 204. [2022-11-19 08:01:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 140 states have (on average 1.2785714285714285) internal successors, (179), 156 states have internal predecessors, (179), 31 states have call successors, (31), 29 states have call predecessors, (31), 32 states have return successors, (44), 31 states have call predecessors, (44), 31 states have call successors, (44) [2022-11-19 08:01:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 254 transitions. [2022-11-19 08:01:01,932 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 254 transitions. Word has length 33 [2022-11-19 08:01:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:01,932 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 254 transitions. [2022-11-19 08:01:01,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:01:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 254 transitions. [2022-11-19 08:01:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:01:01,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:01,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:01,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:01:01,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1444504193, now seen corresponding path program 1 times [2022-11-19 08:01:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302311810] [2022-11-19 08:01:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:02,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302311810] [2022-11-19 08:01:02,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302311810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:02,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:02,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:01:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349318676] [2022-11-19 08:01:02,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:01:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:01:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:01:02,221 INFO L87 Difference]: Start difference. First operand 204 states and 254 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:01:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:02,850 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2022-11-19 08:01:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:01:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-11-19 08:01:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:02,859 INFO L225 Difference]: With dead ends: 456 [2022-11-19 08:01:02,859 INFO L226 Difference]: Without dead ends: 339 [2022-11-19 08:01:02,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:01:02,868 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 252 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:02,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 304 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:01:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-19 08:01:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2022-11-19 08:01:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 217 states have (on average 1.271889400921659) internal successors, (276), 243 states have internal predecessors, (276), 49 states have call successors, (49), 43 states have call predecessors, (49), 50 states have return successors, (70), 50 states have call predecessors, (70), 49 states have call successors, (70) [2022-11-19 08:01:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 395 transitions. [2022-11-19 08:01:02,940 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 395 transitions. Word has length 36 [2022-11-19 08:01:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:02,940 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 395 transitions. [2022-11-19 08:01:02,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:01:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 395 transitions. [2022-11-19 08:01:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:01:02,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:02,952 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:01:02,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1437657817, now seen corresponding path program 1 times [2022-11-19 08:01:02,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890606245] [2022-11-19 08:01:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:02,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:01:03,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890606245] [2022-11-19 08:01:03,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890606245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:03,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073404765] [2022-11-19 08:01:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:03,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:03,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:03,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:01:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:01:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:04,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:01:04,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073404765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:04,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757277899] [2022-11-19 08:01:04,718 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-19 08:01:04,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:04,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:04,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:04,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:07,319 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 48 for LOIs [2022-11-19 08:01:07,329 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-19 08:01:07,458 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-19 08:01:07,518 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-11-19 08:01:07,659 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-19 08:01:07,662 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:12,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [757277899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:12,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:12,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [13, 11, 10] total 53 [2022-11-19 08:01:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953830853] [2022-11-19 08:01:12,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:12,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:01:12,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:01:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:01:12,750 INFO L87 Difference]: Start difference. First operand 317 states and 395 transitions. Second operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:01:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:21,795 INFO L93 Difference]: Finished difference Result 873 states and 1146 transitions. [2022-11-19 08:01:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:01:21,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 67 [2022-11-19 08:01:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:21,799 INFO L225 Difference]: With dead ends: 873 [2022-11-19 08:01:21,799 INFO L226 Difference]: Without dead ends: 612 [2022-11-19 08:01:21,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 156 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1147, Invalid=5825, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 08:01:21,804 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 308 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:21,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 644 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 08:01:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-19 08:01:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 525. [2022-11-19 08:01:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 367 states have (on average 1.2724795640326976) internal successors, (467), 401 states have internal predecessors, (467), 79 states have call successors, (79), 66 states have call predecessors, (79), 78 states have return successors, (122), 82 states have call predecessors, (122), 79 states have call successors, (122) [2022-11-19 08:01:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 668 transitions. [2022-11-19 08:01:21,887 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 668 transitions. Word has length 67 [2022-11-19 08:01:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:21,888 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 668 transitions. [2022-11-19 08:01:21,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:01:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 668 transitions. [2022-11-19 08:01:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 08:01:21,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:21,891 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 08:01:21,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:01:22,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:22,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1125534688, now seen corresponding path program 1 times [2022-11-19 08:01:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:22,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050606689] [2022-11-19 08:01:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:01:22,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:22,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050606689] [2022-11-19 08:01:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050606689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:22,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:01:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833162503] [2022-11-19 08:01:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:22,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:01:22,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:01:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:22,177 INFO L87 Difference]: Start difference. First operand 525 states and 668 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:01:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:22,421 INFO L93 Difference]: Finished difference Result 821 states and 1058 transitions. [2022-11-19 08:01:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:01:22,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2022-11-19 08:01:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:22,429 INFO L225 Difference]: With dead ends: 821 [2022-11-19 08:01:22,430 INFO L226 Difference]: Without dead ends: 569 [2022-11-19 08:01:22,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:01:22,431 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 100 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:22,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 188 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-19 08:01:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2022-11-19 08:01:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 399 states have (on average 1.255639097744361) internal successors, (501), 432 states have internal predecessors, (501), 80 states have call successors, (80), 70 states have call predecessors, (80), 87 states have return successors, (118), 89 states have call predecessors, (118), 80 states have call successors, (118) [2022-11-19 08:01:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 699 transitions. [2022-11-19 08:01:22,537 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 699 transitions. Word has length 75 [2022-11-19 08:01:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:22,538 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 699 transitions. [2022-11-19 08:01:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:01:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 699 transitions. [2022-11-19 08:01:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 08:01:22,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:22,541 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:01:22,541 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash -216031854, now seen corresponding path program 1 times [2022-11-19 08:01:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298326810] [2022-11-19 08:01:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:01:22,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298326810] [2022-11-19 08:01:22,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298326810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:22,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:22,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240233139] [2022-11-19 08:01:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:22,582 INFO L87 Difference]: Start difference. First operand 567 states and 699 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:01:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:22,693 INFO L93 Difference]: Finished difference Result 937 states and 1153 transitions. [2022-11-19 08:01:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-19 08:01:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:22,697 INFO L225 Difference]: With dead ends: 937 [2022-11-19 08:01:22,697 INFO L226 Difference]: Without dead ends: 573 [2022-11-19 08:01:22,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:22,699 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:22,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:01:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-19 08:01:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 567. [2022-11-19 08:01:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 399 states have (on average 1.2481203007518797) internal successors, (498), 432 states have internal predecessors, (498), 80 states have call successors, (80), 70 states have call predecessors, (80), 87 states have return successors, (112), 89 states have call predecessors, (112), 80 states have call successors, (112) [2022-11-19 08:01:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 690 transitions. [2022-11-19 08:01:22,789 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 690 transitions. Word has length 70 [2022-11-19 08:01:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:22,790 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 690 transitions. [2022-11-19 08:01:22,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:01:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 690 transitions. [2022-11-19 08:01:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 08:01:22,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:22,792 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:01:22,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash -893805270, now seen corresponding path program 1 times [2022-11-19 08:01:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602374186] [2022-11-19 08:01:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:22,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:01:23,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602374186] [2022-11-19 08:01:23,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602374186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887099680] [2022-11-19 08:01:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:23,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:23,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:23,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:01:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:01:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:01:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:01:24,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887099680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:24,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197294016] [2022-11-19 08:01:24,260 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-19 08:01:24,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:24,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:24,261 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:24,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:26,912 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-19 08:01:26,932 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-19 08:01:27,014 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-19 08:01:27,060 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-11-19 08:01:27,166 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-19 08:01:27,168 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 41 for LOIs [2022-11-19 08:01:27,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:33,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1197294016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:33,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:33,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [12, 10, 11] total 54 [2022-11-19 08:01:33,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149346750] [2022-11-19 08:01:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:01:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:01:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2616, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:01:33,734 INFO L87 Difference]: Start difference. First operand 567 states and 690 transitions. Second operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:02:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:03,968 INFO L93 Difference]: Finished difference Result 1693 states and 2287 transitions. [2022-11-19 08:02:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 08:02:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 70 [2022-11-19 08:02:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:03,978 INFO L225 Difference]: With dead ends: 1693 [2022-11-19 08:02:03,978 INFO L226 Difference]: Without dead ends: 1414 [2022-11-19 08:02:03,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 163 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=1550, Invalid=12730, Unknown=0, NotChecked=0, Total=14280 [2022-11-19 08:02:03,984 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 411 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 4458 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 4458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:03,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1069 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 4458 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-19 08:02:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-19 08:02:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 897. [2022-11-19 08:02:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 624 states have (on average 1.2451923076923077) internal successors, (777), 677 states have internal predecessors, (777), 131 states have call successors, (131), 112 states have call predecessors, (131), 141 states have return successors, (188), 143 states have call predecessors, (188), 131 states have call successors, (188) [2022-11-19 08:02:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1096 transitions. [2022-11-19 08:02:04,190 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1096 transitions. Word has length 70 [2022-11-19 08:02:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:04,192 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1096 transitions. [2022-11-19 08:02:04,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:02:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1096 transitions. [2022-11-19 08:02:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:02:04,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:04,197 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:02:04,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:02:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:02:04,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1581910990, now seen corresponding path program 1 times [2022-11-19 08:02:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:04,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635036243] [2022-11-19 08:02:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:02:04,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635036243] [2022-11-19 08:02:04,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635036243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003813809] [2022-11-19 08:02:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:04,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:04,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:04,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:02:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:02:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:05,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:02:05,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003813809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:05,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981762845] [2022-11-19 08:02:05,872 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:02:05,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:05,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:05,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:05,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:07,836 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-19 08:02:07,855 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-19 08:02:08,032 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 48 for LOIs [2022-11-19 08:02:08,348 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-19 08:02:08,836 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-19 08:02:08,848 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 33 for LOIs [2022-11-19 08:02:08,850 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:16,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15655#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-19 08:02:16,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:16,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:16,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 29 [2022-11-19 08:02:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775165064] [2022-11-19 08:02:16,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:02:16,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:02:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3622, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 08:02:16,280 INFO L87 Difference]: Start difference. First operand 897 states and 1096 transitions. Second operand has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-19 08:02:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:22,973 INFO L93 Difference]: Finished difference Result 2608 states and 3492 transitions. [2022-11-19 08:02:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-19 08:02:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 71 [2022-11-19 08:02:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:22,985 INFO L225 Difference]: With dead ends: 2608 [2022-11-19 08:02:22,986 INFO L226 Difference]: Without dead ends: 2069 [2022-11-19 08:02:22,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 167 SyntacticMatches, 9 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2018, Invalid=15274, Unknown=0, NotChecked=0, Total=17292 [2022-11-19 08:02:22,993 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1279 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 4642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:22,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1035 Invalid, 4642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 08:02:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-11-19 08:02:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1791. [2022-11-19 08:02:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1246 states have (on average 1.2375601926163724) internal successors, (1542), 1357 states have internal predecessors, (1542), 264 states have call successors, (264), 215 states have call predecessors, (264), 280 states have return successors, (439), 280 states have call predecessors, (439), 264 states have call successors, (439) [2022-11-19 08:02:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2245 transitions. [2022-11-19 08:02:23,341 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2245 transitions. Word has length 71 [2022-11-19 08:02:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:23,341 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2245 transitions. [2022-11-19 08:02:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-19 08:02:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2245 transitions. [2022-11-19 08:02:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 08:02:23,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:23,345 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:02:23,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:23,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:02:23,551 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -734331827, now seen corresponding path program 1 times [2022-11-19 08:02:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660506135] [2022-11-19 08:02:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:02:23,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660506135] [2022-11-19 08:02:23,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660506135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675558819] [2022-11-19 08:02:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:23,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:23,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:23,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:24,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:02:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 08:02:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:24,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:25,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675558819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216502753] [2022-11-19 08:02:25,389 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:02:25,389 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:25,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:25,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:25,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:28,401 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-19 08:02:28,678 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 40 for LOIs [2022-11-19 08:02:28,854 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 38 for LOIs [2022-11-19 08:02:29,026 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 49 for LOIs [2022-11-19 08:02:29,034 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 42 for LOIs [2022-11-19 08:02:29,046 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2022-11-19 08:02:29,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:36,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22982#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= ~methaneLevelCritical~0 1) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (<= 0 ~head~0.base) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-19 08:02:36,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:36,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:36,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 33 [2022-11-19 08:02:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465589717] [2022-11-19 08:02:36,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:02:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:02:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 08:02:36,845 INFO L87 Difference]: Start difference. First operand 1791 states and 2245 transitions. Second operand has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 08:02:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:43,003 INFO L93 Difference]: Finished difference Result 7437 states and 10316 transitions. [2022-11-19 08:02:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-19 08:02:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) Word has length 74 [2022-11-19 08:02:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:43,037 INFO L225 Difference]: With dead ends: 7437 [2022-11-19 08:02:43,037 INFO L226 Difference]: Without dead ends: 6063 [2022-11-19 08:02:43,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 197 SyntacticMatches, 14 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1548, Invalid=14708, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 08:02:43,049 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 2233 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2237 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 5071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1330 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:43,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2237 Valid, 1342 Invalid, 5071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1330 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 08:02:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-11-19 08:02:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4026. [2022-11-19 08:02:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 2825 states have (on average 1.223362831858407) internal successors, (3456), 3043 states have internal predecessors, (3456), 559 states have call successors, (559), 491 states have call predecessors, (559), 641 states have return successors, (853), 614 states have call predecessors, (853), 559 states have call successors, (853) [2022-11-19 08:02:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 4868 transitions. [2022-11-19 08:02:44,197 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 4868 transitions. Word has length 74 [2022-11-19 08:02:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:44,197 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 4868 transitions. [2022-11-19 08:02:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 08:02:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 4868 transitions. [2022-11-19 08:02:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:02:44,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:44,204 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:44,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:02:44,409 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1645685728, now seen corresponding path program 1 times [2022-11-19 08:02:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354936471] [2022-11-19 08:02:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:02:44,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354936471] [2022-11-19 08:02:44,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354936471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637743230] [2022-11-19 08:02:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:44,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:44,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:44,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:02:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 08:02:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:02:45,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:02:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637743230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593933495] [2022-11-19 08:02:45,964 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-19 08:02:45,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:45,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:45,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:45,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:47,731 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2022-11-19 08:02:47,861 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 27 for LOIs [2022-11-19 08:02:47,902 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 27 for LOIs [2022-11-19 08:02:48,005 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 29 for LOIs [2022-11-19 08:02:48,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:55,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40959#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (<= 0 |#NULL.base|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (<= |#NULL.offset| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-19 08:02:55,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:55,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:55,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-11-19 08:02:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901913554] [2022-11-19 08:02:55,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:02:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:02:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:02:55,098 INFO L87 Difference]: Start difference. First operand 4026 states and 4868 transitions. Second operand has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-19 08:03:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:05,196 INFO L93 Difference]: Finished difference Result 10954 states and 13947 transitions. [2022-11-19 08:03:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-19 08:03:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) Word has length 81 [2022-11-19 08:03:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:05,253 INFO L225 Difference]: With dead ends: 10954 [2022-11-19 08:03:05,253 INFO L226 Difference]: Without dead ends: 10113 [2022-11-19 08:03:05,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 264 SyntacticMatches, 4 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13172 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3217, Invalid=30455, Unknown=0, NotChecked=0, Total=33672 [2022-11-19 08:03:05,266 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1647 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 5582 mSolverCounterSat, 1394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 6976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1394 IncrementalHoareTripleChecker+Valid, 5582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:05,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1916 Invalid, 6976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1394 Valid, 5582 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 08:03:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2022-11-19 08:03:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 7402. [2022-11-19 08:03:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 5232 states have (on average 1.2201834862385321) internal successors, (6384), 5584 states have internal predecessors, (6384), 989 states have call successors, (989), 892 states have call predecessors, (989), 1180 states have return successors, (1526), 1120 states have call predecessors, (1526), 989 states have call successors, (1526) [2022-11-19 08:03:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8899 transitions. [2022-11-19 08:03:06,881 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8899 transitions. Word has length 81 [2022-11-19 08:03:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:06,882 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8899 transitions. [2022-11-19 08:03:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-19 08:03:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8899 transitions. [2022-11-19 08:03:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 08:03:06,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:06,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:06,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:07,098 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1544188245, now seen corresponding path program 1 times [2022-11-19 08:03:07,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007043615] [2022-11-19 08:03:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:03:07,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007043615] [2022-11-19 08:03:07,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007043615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059138644] [2022-11-19 08:03:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:07,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:07,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:07,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:07,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:03:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:07,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:03:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:08,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:03:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059138644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552712331] [2022-11-19 08:03:09,271 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:03:09,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:09,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:09,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:09,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:11,051 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2022-11-19 08:03:11,239 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 49 for LOIs [2022-11-19 08:03:11,677 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 38 for LOIs [2022-11-19 08:03:11,892 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 51 for LOIs [2022-11-19 08:03:11,909 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2022-11-19 08:03:11,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:19,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69654#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (<= 0 ~systemActive~0) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-19 08:03:19,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:19,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:19,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 32 [2022-11-19 08:03:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076452129] [2022-11-19 08:03:19,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:19,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:03:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:03:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=3841, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 08:03:19,712 INFO L87 Difference]: Start difference. First operand 7402 states and 8899 transitions. Second operand has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-19 08:03:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:24,631 INFO L93 Difference]: Finished difference Result 16448 states and 20176 transitions. [2022-11-19 08:03:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 08:03:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 85 [2022-11-19 08:03:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:24,672 INFO L225 Difference]: With dead ends: 16448 [2022-11-19 08:03:24,673 INFO L226 Difference]: Without dead ends: 9630 [2022-11-19 08:03:24,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 202 SyntacticMatches, 11 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5321 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1578, Invalid=11304, Unknown=0, NotChecked=0, Total=12882 [2022-11-19 08:03:24,692 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 950 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:24,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 520 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:03:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2022-11-19 08:03:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 5884. [2022-11-19 08:03:25,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5884 states, 4170 states have (on average 1.2167865707434053) internal successors, (5074), 4478 states have internal predecessors, (5074), 810 states have call successors, (810), 698 states have call predecessors, (810), 903 states have return successors, (1199), 832 states have call predecessors, (1199), 810 states have call successors, (1199) [2022-11-19 08:03:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5884 states to 5884 states and 7083 transitions. [2022-11-19 08:03:25,931 INFO L78 Accepts]: Start accepts. Automaton has 5884 states and 7083 transitions. Word has length 85 [2022-11-19 08:03:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:25,932 INFO L495 AbstractCegarLoop]: Abstraction has 5884 states and 7083 transitions. [2022-11-19 08:03:25,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-19 08:03:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5884 states and 7083 transitions. [2022-11-19 08:03:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:03:25,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:25,942 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:03:25,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:26,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:03:26,149 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1688946847, now seen corresponding path program 2 times [2022-11-19 08:03:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:26,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355091869] [2022-11-19 08:03:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:03:27,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355091869] [2022-11-19 08:03:27,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355091869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031979357] [2022-11-19 08:03:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:03:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:27,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:27,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:03:27,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:03:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:03:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:03:27,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:27,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031979357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:27,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:27,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-11-19 08:03:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738734980] [2022-11-19 08:03:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:03:27,265 INFO L87 Difference]: Start difference. First operand 5884 states and 7083 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:03:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:29,186 INFO L93 Difference]: Finished difference Result 11042 states and 13368 transitions. [2022-11-19 08:03:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:03:29,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 106 [2022-11-19 08:03:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:29,217 INFO L225 Difference]: With dead ends: 11042 [2022-11-19 08:03:29,218 INFO L226 Difference]: Without dead ends: 6567 [2022-11-19 08:03:29,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:03:29,230 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 68 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:29,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 366 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-11-19 08:03:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 6438. [2022-11-19 08:03:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 4585 states have (on average 1.2122137404580153) internal successors, (5558), 4907 states have internal predecessors, (5558), 872 states have call successors, (872), 777 states have call predecessors, (872), 980 states have return successors, (1250), 891 states have call predecessors, (1250), 872 states have call successors, (1250) [2022-11-19 08:03:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 7680 transitions. [2022-11-19 08:03:30,856 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 7680 transitions. Word has length 106 [2022-11-19 08:03:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:30,856 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 7680 transitions. [2022-11-19 08:03:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:03:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 7680 transitions. [2022-11-19 08:03:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:03:30,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:30,867 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-19 08:03:30,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:03:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:03:31,072 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1326730206, now seen corresponding path program 1 times [2022-11-19 08:03:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768230601] [2022-11-19 08:03:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:03:31,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768230601] [2022-11-19 08:03:31,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768230601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202963479] [2022-11-19 08:03:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:31,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:31,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:03:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 08:03:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 69 proven. 58 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:03:32,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:03:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202963479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:33,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954148270] [2022-11-19 08:03:33,416 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2022-11-19 08:03:33,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:33,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:33,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:33,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:34,910 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-19 08:03:34,922 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-19 08:03:35,046 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 48 for LOIs [2022-11-19 08:03:35,366 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-19 08:03:35,691 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-19 08:03:35,697 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 33 for LOIs [2022-11-19 08:03:35,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:44,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '131521#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-19 08:03:44,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:44,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:44,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 41 [2022-11-19 08:03:44,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451999622] [2022-11-19 08:03:44,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 08:03:44,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:44,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 08:03:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5020, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 08:03:44,311 INFO L87 Difference]: Start difference. First operand 6438 states and 7680 transitions. Second operand has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2022-11-19 08:03:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:47,894 INFO L93 Difference]: Finished difference Result 8321 states and 10083 transitions. [2022-11-19 08:03:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 08:03:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) Word has length 126 [2022-11-19 08:03:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:47,897 INFO L225 Difference]: With dead ends: 8321 [2022-11-19 08:03:47,897 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:03:47,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 315 SyntacticMatches, 15 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6017 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1881, Invalid=12881, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 08:03:47,916 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1405 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:47,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 467 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:03:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:03:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:03:47,918 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) [2022-11-19 08:03:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:03:47,919 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2022-11-19 08:03:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:47,920 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:03:47,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2022-11-19 08:03:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:03:47,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:03:47,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:03:47,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb9fc7f4-0dbb-4039-80b3-69d9562937cc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:48,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 08:04:32,613 WARN L233 SmtUtils]: Spent 40.90s on a formula simplification. DAG size of input: 751 DAG size of output: 702 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-19 08:05:06,315 WARN L233 SmtUtils]: Spent 22.34s on a formula simplification. DAG size of input: 737 DAG size of output: 620 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-19 08:05:38,758 WARN L233 SmtUtils]: Spent 32.44s on a formula simplification. DAG size of input: 977 DAG size of output: 925 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)