./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --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 0619cf376c55d0c5059a9fcafc1519de09a8e72548b38d7587e0bc4190ad2779 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:34:47,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:34:47,516 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:34:47,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:34:47,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:34:47,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:34:47,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:34:47,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:34:47,568 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:34:47,573 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:34:47,574 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:34:47,575 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:34:47,576 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:34:47,577 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:34:47,578 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:34:47,579 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:34:47,579 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:34:47,580 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:34:47,580 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:34:47,581 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:34:47,582 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:34:47,583 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:34:47,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:34:47,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:34:47,585 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:34:47,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:34:47,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:34:47,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:34:47,587 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:34:47,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:34:47,589 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:34:47,589 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:34:47,590 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:34:47,590 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:34:47,590 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:34:47,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:34:47,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:34:47,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:47,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:34:47,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:34:47,592 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:34:47,592 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:34:47,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:34:47,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:34:47,594 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:34:47,594 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:34:47,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:34:47,594 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0619cf376c55d0c5059a9fcafc1519de09a8e72548b38d7587e0bc4190ad2779 [2023-11-21 19:34:47,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:34:47,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:34:47,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:34:47,977 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:34:47,978 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:34:47,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2023-11-21 19:34:51,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:34:51,502 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:34:51,503 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2023-11-21 19:34:51,519 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/data/0b635d8fd/a51120d60d82410991d272642bfdd16c/FLAG8d07d5462 [2023-11-21 19:34:51,534 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/data/0b635d8fd/a51120d60d82410991d272642bfdd16c [2023-11-21 19:34:51,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:34:51,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:34:51,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:51,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:34:51,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:34:51,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:51" (1/1) ... [2023-11-21 19:34:51,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a77634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:51, skipping insertion in model container [2023-11-21 19:34:51,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:51" (1/1) ... [2023-11-21 19:34:51,603 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:51,883 WARN L240 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_d9479837-5968-4fff-b63f-ac99505352b6/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16710,16723] [2023-11-21 19:34:51,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:51,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:34:51,942 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] [2023-11-21 19:34:51,943 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [153] [2023-11-21 19:34:51,944 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [221] [2023-11-21 19:34:51,944 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [439] [2023-11-21 19:34:51,944 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [805] [2023-11-21 19:34:51,945 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [833] [2023-11-21 19:34:51,945 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [842] [2023-11-21 19:34:51,945 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [877] [2023-11-21 19:34:52,047 WARN L240 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_d9479837-5968-4fff-b63f-ac99505352b6/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16710,16723] [2023-11-21 19:34:52,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:52,080 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:34:52,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52 WrapperNode [2023-11-21 19:34:52,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:52,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:52,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:34:52,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:34:52,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,137 INFO L138 Inliner]: procedures = 55, calls = 101, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 209 [2023-11-21 19:34:52,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:52,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:34:52,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:34:52,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:34:52,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:34:52,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:34:52,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:34:52,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:34:52,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (1/1) ... [2023-11-21 19:34:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:52,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:52,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:34:52,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:34:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:34:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-21 19:34:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-21 19:34:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 19:34:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 19:34:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 19:34:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 19:34:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-21 19:34:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-21 19:34:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 19:34:52,282 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 19:34:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-21 19:34:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-21 19:34:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-21 19:34:52,284 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-21 19:34:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:34:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-21 19:34:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-21 19:34:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:34:52,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:34:52,414 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:34:52,417 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:34:52,828 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:34:52,961 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:34:52,961 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 19:34:52,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:52 BoogieIcfgContainer [2023-11-21 19:34:52,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:34:52,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:34:52,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:34:52,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:34:52,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:34:51" (1/3) ... [2023-11-21 19:34:52,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e121a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:52, skipping insertion in model container [2023-11-21 19:34:52,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:52" (2/3) ... [2023-11-21 19:34:52,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e121a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:52, skipping insertion in model container [2023-11-21 19:34:52,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:52" (3/3) ... [2023-11-21 19:34:52,975 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product47.cil.c [2023-11-21 19:34:52,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:34:52,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:34:53,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:34:53,049 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=LoopHeads, 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;@d7232c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:34:53,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:34:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-21 19:34:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:34:53,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:53,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:53,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:53,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1454168646, now seen corresponding path program 1 times [2023-11-21 19:34:53,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:53,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643418311] [2023-11-21 19:34:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:53,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643418311] [2023-11-21 19:34:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643418311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:53,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:53,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:34:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298739621] [2023-11-21 19:34:53,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:53,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 19:34:53,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 19:34:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 19:34:53,316 INFO L87 Difference]: Start difference. First operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) 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) [2023-11-21 19:34:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:53,419 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2023-11-21 19:34:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 19:34:53,422 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 [2023-11-21 19:34:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:53,435 INFO L225 Difference]: With dead ends: 128 [2023-11-21 19:34:53,435 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 19:34:53,440 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 [2023-11-21 19:34:53,448 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:53,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 19:34:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-21 19:34:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 19:34:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2023-11-21 19:34:53,517 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2023-11-21 19:34:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:53,518 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2023-11-21 19:34:53,518 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) [2023-11-21 19:34:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2023-11-21 19:34:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:34:53,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:53,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:34:53,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:53,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash 998047794, now seen corresponding path program 1 times [2023-11-21 19:34:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:53,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761459954] [2023-11-21 19:34:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:53,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:53,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:53,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761459954] [2023-11-21 19:34:53,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761459954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:53,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:53,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:34:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492767756] [2023-11-21 19:34:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:53,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:34:53,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:34:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:34:53,635 INFO L87 Difference]: Start difference. First operand 60 states and 78 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) [2023-11-21 19:34:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:53,680 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2023-11-21 19:34:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:34:53,681 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 [2023-11-21 19:34:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:53,682 INFO L225 Difference]: With dead ends: 92 [2023-11-21 19:34:53,683 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 19:34:53,684 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 [2023-11-21 19:34:53,685 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:53,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:34:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 19:34:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-21 19:34:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 19:34:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2023-11-21 19:34:53,696 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 13 [2023-11-21 19:34:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:53,697 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2023-11-21 19:34:53,697 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) [2023-11-21 19:34:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2023-11-21 19:34:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:34:53,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:53,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:34:53,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:53,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash -973465868, now seen corresponding path program 1 times [2023-11-21 19:34:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:53,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935204666] [2023-11-21 19:34:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:53,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:53,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935204666] [2023-11-21 19:34:53,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935204666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:53,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:53,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:34:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209155474] [2023-11-21 19:34:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:34:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:34:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:34:53,913 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-21 19:34:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:54,166 INFO L93 Difference]: Finished difference Result 145 states and 194 transitions. [2023-11-21 19:34:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:34:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2023-11-21 19:34:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:54,172 INFO L225 Difference]: With dead ends: 145 [2023-11-21 19:34:54,172 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 19:34:54,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:54,175 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:54,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 128 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 19:34:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-11-21 19:34:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 62 states have internal predecessors, (70), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (16), 11 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-21 19:34:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2023-11-21 19:34:54,195 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 16 [2023-11-21 19:34:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:54,195 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2023-11-21 19:34:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-21 19:34:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2023-11-21 19:34:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:34:54,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:54,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:34:54,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:54,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1154660714, now seen corresponding path program 1 times [2023-11-21 19:34:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803334318] [2023-11-21 19:34:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:54,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803334318] [2023-11-21 19:34:54,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803334318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:54,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:54,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:34:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112056257] [2023-11-21 19:34:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:34:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:34:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:54,438 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2023-11-21 19:34:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:54,583 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2023-11-21 19:34:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:34:54,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2023-11-21 19:34:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:54,586 INFO L225 Difference]: With dead ends: 241 [2023-11-21 19:34:54,586 INFO L226 Difference]: Without dead ends: 165 [2023-11-21 19:34:54,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:34:54,589 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 81 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:54,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 166 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-21 19:34:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2023-11-21 19:34:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 109 states have (on average 1.311926605504587) internal successors, (143), 127 states have internal predecessors, (143), 27 states have call successors, (27), 23 states have call predecessors, (27), 25 states have return successors, (32), 25 states have call predecessors, (32), 27 states have call successors, (32) [2023-11-21 19:34:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-11-21 19:34:54,621 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 19 [2023-11-21 19:34:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:54,621 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-11-21 19:34:54,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2023-11-21 19:34:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-11-21 19:34:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 19:34:54,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:54,625 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:34:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:34:54,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:54,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -326542520, now seen corresponding path program 1 times [2023-11-21 19:34:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715504106] [2023-11-21 19:34:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:54,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715504106] [2023-11-21 19:34:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715504106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333275116] [2023-11-21 19:34:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:54,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:54,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:54,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:54,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:34:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:55,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 19:34:55,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:34:55,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:34:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333275116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037504843] [2023-11-21 19:34:55,935 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-21 19:34:55,935 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:55,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:55,947 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:55,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:58,102 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-11-21 19:34:58,412 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-11-21 19:34:58,619 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 31 for LOIs [2023-11-21 19:34:58,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:35:01,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1715#(and (<= 1 |#StackHeapBarrier|) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483647) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_5| Int)) (and (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_5|)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_5| 2147483647) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_5| 0)))) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483648)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (= ~head~0.base 0) (= ~waterLevel~0 0) (= |old(~waterLevel~0)| 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-21 19:35:01,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:35:01,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:35:01,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-11-21 19:35:01,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084898158] [2023-11-21 19:35:01,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:35:01,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 19:35:01,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 19:35:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2023-11-21 19:35:01,261 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-21 19:35:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:04,920 INFO L93 Difference]: Finished difference Result 1365 states and 1841 transitions. [2023-11-21 19:35:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-21 19:35:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 52 [2023-11-21 19:35:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:04,943 INFO L225 Difference]: With dead ends: 1365 [2023-11-21 19:35:04,943 INFO L226 Difference]: Without dead ends: 1205 [2023-11-21 19:35:04,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4872 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1583, Invalid=11299, Unknown=0, NotChecked=0, Total=12882 [2023-11-21 19:35:04,954 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1094 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:04,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 807 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 19:35:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2023-11-21 19:35:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 735. [2023-11-21 19:35:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 525 states have (on average 1.321904761904762) internal successors, (694), 568 states have internal predecessors, (694), 98 states have call successors, (98), 96 states have call predecessors, (98), 111 states have return successors, (150), 109 states have call predecessors, (150), 98 states have call successors, (150) [2023-11-21 19:35:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 942 transitions. [2023-11-21 19:35:05,128 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 942 transitions. Word has length 52 [2023-11-21 19:35:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:05,129 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 942 transitions. [2023-11-21 19:35:05,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-21 19:35:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 942 transitions. [2023-11-21 19:35:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 19:35:05,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:05,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:05,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:35:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:35:05,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:05,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:05,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1185824576, now seen corresponding path program 1 times [2023-11-21 19:35:05,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:05,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534790531] [2023-11-21 19:35:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:05,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:35:05,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:35:05,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534790531] [2023-11-21 19:35:05,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534790531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:35:05,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:35:05,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:35:05,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393150121] [2023-11-21 19:35:05,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:35:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:35:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:35:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:35:05,476 INFO L87 Difference]: Start difference. First operand 735 states and 942 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 19:35:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:05,637 INFO L93 Difference]: Finished difference Result 1021 states and 1320 transitions. [2023-11-21 19:35:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:35:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-11-21 19:35:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:05,644 INFO L225 Difference]: With dead ends: 1021 [2023-11-21 19:35:05,644 INFO L226 Difference]: Without dead ends: 750 [2023-11-21 19:35:05,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:35:05,647 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:05,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 254 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:35:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-21 19:35:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 724. [2023-11-21 19:35:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 518 states have (on average 1.3127413127413128) internal successors, (680), 559 states have internal predecessors, (680), 96 states have call successors, (96), 95 states have call predecessors, (96), 109 states have return successors, (140), 108 states have call predecessors, (140), 96 states have call successors, (140) [2023-11-21 19:35:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 916 transitions. [2023-11-21 19:35:05,719 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 916 transitions. Word has length 52 [2023-11-21 19:35:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:05,720 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 916 transitions. [2023-11-21 19:35:05,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 19:35:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 916 transitions. [2023-11-21 19:35:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 19:35:05,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:05,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:35:05,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:05,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 390405675, now seen corresponding path program 1 times [2023-11-21 19:35:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:05,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183531354] [2023-11-21 19:35:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:35:05,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:35:05,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183531354] [2023-11-21 19:35:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183531354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:35:05,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:35:05,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:35:05,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562125069] [2023-11-21 19:35:05,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:35:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:35:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:35:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:35:05,776 INFO L87 Difference]: Start difference. First operand 724 states and 916 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 19:35:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:05,906 INFO L93 Difference]: Finished difference Result 1257 states and 1594 transitions. [2023-11-21 19:35:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:35:05,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-11-21 19:35:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:05,911 INFO L225 Difference]: With dead ends: 1257 [2023-11-21 19:35:05,911 INFO L226 Difference]: Without dead ends: 479 [2023-11-21 19:35:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:35:05,915 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:05,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 122 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:35:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-21 19:35:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 368. [2023-11-21 19:35:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 256 states have (on average 1.265625) internal successors, (324), 279 states have internal predecessors, (324), 52 states have call successors, (52), 51 states have call predecessors, (52), 59 states have return successors, (66), 58 states have call predecessors, (66), 52 states have call successors, (66) [2023-11-21 19:35:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 442 transitions. [2023-11-21 19:35:05,962 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 442 transitions. Word has length 58 [2023-11-21 19:35:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:05,963 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 442 transitions. [2023-11-21 19:35:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 19:35:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 442 transitions. [2023-11-21 19:35:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 19:35:05,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:05,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:35:05,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:05,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1460293355, now seen corresponding path program 1 times [2023-11-21 19:35:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838436171] [2023-11-21 19:35:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:35:06,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:35:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838436171] [2023-11-21 19:35:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838436171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:35:06,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659959715] [2023-11-21 19:35:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:35:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:35:06,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:35:06,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:35:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:06,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 19:35:06,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:35:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:35:06,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:35:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659959715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:35:06,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:35:06,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2023-11-21 19:35:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929191171] [2023-11-21 19:35:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:35:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 19:35:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 19:35:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-21 19:35:06,771 INFO L87 Difference]: Start difference. First operand 368 states and 442 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 19:35:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:07,360 INFO L93 Difference]: Finished difference Result 931 states and 1157 transitions. [2023-11-21 19:35:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 19:35:07,361 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 55 [2023-11-21 19:35:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:07,365 INFO L225 Difference]: With dead ends: 931 [2023-11-21 19:35:07,365 INFO L226 Difference]: Without dead ends: 626 [2023-11-21 19:35:07,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-11-21 19:35:07,389 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 183 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:07,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 292 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:35:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-21 19:35:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 571. [2023-11-21 19:35:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 406 states have (on average 1.2783251231527093) internal successors, (519), 434 states have internal predecessors, (519), 79 states have call successors, (79), 77 states have call predecessors, (79), 85 states have return successors, (107), 84 states have call predecessors, (107), 79 states have call successors, (107) [2023-11-21 19:35:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 705 transitions. [2023-11-21 19:35:07,459 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 705 transitions. Word has length 55 [2023-11-21 19:35:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:07,460 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 705 transitions. [2023-11-21 19:35:07,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 19:35:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 705 transitions. [2023-11-21 19:35:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 19:35:07,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:07,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:07,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 19:35:07,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:35:07,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:07,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash -221523798, now seen corresponding path program 1 times [2023-11-21 19:35:07,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:07,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204053181] [2023-11-21 19:35:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:35:07,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:35:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204053181] [2023-11-21 19:35:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204053181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:35:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928876772] [2023-11-21 19:35:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:35:07,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:35:07,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:35:07,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:35:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:08,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 19:35:08,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:35:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:35:08,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:35:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 19:35:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928876772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:35:08,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003801059] [2023-11-21 19:35:08,925 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-21 19:35:08,926 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:35:08,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:35:08,926 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:35:08,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:35:11,482 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 138 for LOIs [2023-11-21 19:35:11,612 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 20 for LOIs [2023-11-21 19:35:11,965 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 21 for LOIs [2023-11-21 19:35:12,081 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2023-11-21 19:35:12,093 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 16 for LOIs [2023-11-21 19:35:12,098 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 44 for LOIs [2023-11-21 19:35:12,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:35:16,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11637#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483648)) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (<= ~methaneLevelCritical~0 2147483647) (= ~waterLevel~0 0))' at error location [2023-11-21 19:35:16,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:35:16,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:35:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2023-11-21 19:35:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160927281] [2023-11-21 19:35:16,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:35:16,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 19:35:16,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 19:35:16,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=3539, Unknown=0, NotChecked=0, Total=3906 [2023-11-21 19:35:16,356 INFO L87 Difference]: Start difference. First operand 571 states and 705 transitions. Second operand has 27 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 12 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-21 19:35:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:22,255 INFO L93 Difference]: Finished difference Result 1743 states and 2315 transitions. [2023-11-21 19:35:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-21 19:35:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 12 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) Word has length 58 [2023-11-21 19:35:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:22,265 INFO L225 Difference]: With dead ends: 1743 [2023-11-21 19:35:22,266 INFO L226 Difference]: Without dead ends: 1206 [2023-11-21 19:35:22,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8044 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2987, Invalid=19965, Unknown=0, NotChecked=0, Total=22952 [2023-11-21 19:35:22,279 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1602 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:22,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 573 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-21 19:35:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2023-11-21 19:35:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 899. [2023-11-21 19:35:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 640 states have (on average 1.2046875) internal successors, (771), 682 states have internal predecessors, (771), 129 states have call successors, (129), 124 states have call predecessors, (129), 129 states have return successors, (162), 128 states have call predecessors, (162), 129 states have call successors, (162) [2023-11-21 19:35:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1062 transitions. [2023-11-21 19:35:22,445 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1062 transitions. Word has length 58 [2023-11-21 19:35:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:22,445 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1062 transitions. [2023-11-21 19:35:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 12 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-21 19:35:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1062 transitions. [2023-11-21 19:35:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-21 19:35:22,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:22,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:22,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:35:22,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:35:22,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:22,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1984040276, now seen corresponding path program 1 times [2023-11-21 19:35:22,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:22,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245602372] [2023-11-21 19:35:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:22,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:35:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-21 19:35:22,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:35:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245602372] [2023-11-21 19:35:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245602372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:35:22,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:35:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:35:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569253123] [2023-11-21 19:35:22,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:35:22,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:35:22,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:35:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:35:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:35:22,868 INFO L87 Difference]: Start difference. First operand 899 states and 1062 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-21 19:35:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:35:23,061 INFO L93 Difference]: Finished difference Result 932 states and 1101 transitions. [2023-11-21 19:35:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:35:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 87 [2023-11-21 19:35:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:35:23,072 INFO L225 Difference]: With dead ends: 932 [2023-11-21 19:35:23,073 INFO L226 Difference]: Without dead ends: 898 [2023-11-21 19:35:23,074 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 [2023-11-21 19:35:23,075 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:35:23,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 137 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:35:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-11-21 19:35:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 837. [2023-11-21 19:35:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 593 states have (on average 1.1770657672849916) internal successors, (698), 630 states have internal predecessors, (698), 121 states have call successors, (121), 117 states have call predecessors, (121), 122 states have return successors, (154), 121 states have call predecessors, (154), 121 states have call successors, (154) [2023-11-21 19:35:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 973 transitions. [2023-11-21 19:35:23,221 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 973 transitions. Word has length 87 [2023-11-21 19:35:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:35:23,222 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 973 transitions. [2023-11-21 19:35:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-21 19:35:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 973 transitions. [2023-11-21 19:35:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 19:35:23,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:35:23,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:35:23,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:35:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:35:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1220422086, now seen corresponding path program 1 times [2023-11-21 19:35:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:35:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787877449] [2023-11-21 19:35:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:35:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:35:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:35:23,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:35:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:35:23,377 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:35:23,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:35:23,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 19:35:23,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:35:23,385 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:35:23,391 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:35:23,475 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-11-21 19:35:23,480 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-21 19:35:23,490 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-21 19:35:23,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:35:23 BoogieIcfgContainer [2023-11-21 19:35:23,537 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:35:23,538 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:35:23,538 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:35:23,538 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:35:23,539 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:52" (3/4) ... [2023-11-21 19:35:23,540 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-21 19:35:23,582 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-11-21 19:35:23,588 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-21 19:35:23,591 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-21 19:35:23,705 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/witness.graphml [2023-11-21 19:35:23,705 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:35:23,706 INFO L158 Benchmark]: Toolchain (without parser) took 32167.72ms. Allocated memory was 151.0MB in the beginning and 461.4MB in the end (delta: 310.4MB). Free memory was 104.1MB in the beginning and 221.4MB in the end (delta: -117.3MB). Peak memory consumption was 195.2MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,707 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 113.2MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:35:23,707 INFO L158 Benchmark]: CACSL2BoogieTranslator took 541.06ms. Allocated memory is still 151.0MB. Free memory was 104.1MB in the beginning and 84.9MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.58ms. Allocated memory is still 151.0MB. Free memory was 84.9MB in the beginning and 82.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,708 INFO L158 Benchmark]: Boogie Preprocessor took 44.89ms. Allocated memory is still 151.0MB. Free memory was 82.4MB in the beginning and 81.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,709 INFO L158 Benchmark]: RCFGBuilder took 778.69ms. Allocated memory is still 151.0MB. Free memory was 81.0MB in the beginning and 106.9MB in the end (delta: -25.9MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,709 INFO L158 Benchmark]: TraceAbstraction took 30571.87ms. Allocated memory was 151.0MB in the beginning and 461.4MB in the end (delta: 310.4MB). Free memory was 106.1MB in the beginning and 228.8MB in the end (delta: -122.7MB). Peak memory consumption was 187.3MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,710 INFO L158 Benchmark]: Witness Printer took 167.40ms. Allocated memory is still 461.4MB. Free memory was 228.8MB in the beginning and 221.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 19:35:23,712 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 113.2MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 541.06ms. Allocated memory is still 151.0MB. Free memory was 104.1MB in the beginning and 84.9MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.58ms. Allocated memory is still 151.0MB. Free memory was 84.9MB in the beginning and 82.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.89ms. Allocated memory is still 151.0MB. Free memory was 82.4MB in the beginning and 81.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 778.69ms. Allocated memory is still 151.0MB. Free memory was 81.0MB in the beginning and 106.9MB in the end (delta: -25.9MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 30571.87ms. Allocated memory was 151.0MB in the beginning and 461.4MB in the end (delta: 310.4MB). Free memory was 106.1MB in the beginning and 228.8MB in the end (delta: -122.7MB). Peak memory consumption was 187.3MB. Max. memory is 16.1GB. * Witness Printer took 167.40ms. Allocated memory is still 461.4MB. Free memory was 228.8MB in the beginning and 221.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 49]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] - GenericResultAtLocation [Line: 153]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [153] - GenericResultAtLocation [Line: 221]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [221] - GenericResultAtLocation [Line: 439]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [439] - GenericResultAtLocation [Line: 805]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [805] - GenericResultAtLocation [Line: 833]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [833] - GenericResultAtLocation [Line: 842]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [842] - GenericResultAtLocation [Line: 877]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [877] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 838]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L50] int cleanupTimeShifts = 4; [L229] int pumpRunning = 0; [L230] int systemActive = 1; [L609] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L878] int waterLevel = 1; [L879] int methaneLevelCritical = 0; [L131] int retValue_acc ; [L132] int tmp ; [L136] FCALL select_helpers() [L137] FCALL select_features() [L138] CALL, EXPR valid_product() [L869] int retValue_acc ; [L872] retValue_acc = 1 [L873] return (retValue_acc); [L138] RET, EXPR valid_product() [L138] tmp = valid_product() [L140] COND TRUE \read(tmp) [L142] FCALL setup() [L143] CALL runTest() [L122] CALL test() [L156] int splverifierCounter ; [L157] int tmp ; [L158] int tmp___0 ; [L159] int tmp___1 ; [L160] int tmp___2 ; [L163] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L177] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L896] COND TRUE waterLevel < 2 [L897] waterLevel = waterLevel + 1 [L177] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=-1, waterLevel=2] [L210] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L237] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L295] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L310] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L266] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L269] COND TRUE ! pumpRunning [L271] CALL, EXPR isHighWaterLevel() [L406] int retValue_acc ; [L407] int tmp ; [L408] int tmp___0 ; [L412] CALL, EXPR isHighWaterSensorDry() [L958] int retValue_acc ; [L961] COND FALSE !(waterLevel < 2) [L965] retValue_acc = 0 [L966] return (retValue_acc); [L412] RET, EXPR isHighWaterSensorDry() [L412] tmp = isHighWaterSensorDry() [L414] COND FALSE !(\read(tmp)) [L417] tmp___0 = 1 [L419] retValue_acc = tmp___0 [L420] return (retValue_acc); [L271] RET, EXPR isHighWaterLevel() [L271] tmp = isHighWaterLevel() [L273] COND TRUE \read(tmp) [L275] CALL activatePump() [L325] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L329] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L329] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L329] tmp = isMethaneAlarm() [L331] COND FALSE !(\read(tmp)) [L335] CALL activatePump__wrappee__highWaterSensor() [L320] pumpRunning = 1 [L335] RET activatePump__wrappee__highWaterSensor() [L275] RET activatePump() [L310] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L252] RET __utac_acc__Specification4_spec__1() [L210] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=-1, waterLevel=2] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=-1, waterLevel=2] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-1, waterLevel=2] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-1, waterLevel=2] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-2, waterLevel=2] [L210] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L237] COND TRUE \read(pumpRunning) [L239] CALL lowerWaterLevel() [L884] COND TRUE waterLevel > 0 [L885] waterLevel = waterLevel - 1 [L239] RET lowerWaterLevel() [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L295] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L297] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L297] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L297] tmp = isMethaneAlarm() [L299] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L305] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L266] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L269] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L284] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L305] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L252] RET __utac_acc__Specification4_spec__1() [L210] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-2, waterLevel=1] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-2, waterLevel=1] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-2, waterLevel=1] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-2, waterLevel=1] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=-3, waterLevel=1] [L210] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L237] COND TRUE \read(pumpRunning) [L239] CALL lowerWaterLevel() [L884] COND TRUE waterLevel > 0 [L885] waterLevel = waterLevel - 1 [L239] RET lowerWaterLevel() [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L295] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L297] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L297] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L297] tmp = isMethaneAlarm() [L299] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L305] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L266] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L269] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L284] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L305] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND TRUE tmp == 0 [L818] CALL, EXPR isPumpRunning() [L361] int retValue_acc ; [L364] retValue_acc = pumpRunning [L365] return (retValue_acc); [L818] RET, EXPR isPumpRunning() [L818] tmp___0 = isPumpRunning() [L820] COND TRUE \read(tmp___0) [L822] CALL __automaton_fail() [L838] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.4s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3271 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3238 mSDsluCounter, 2635 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2025 mSDsCounter, 1737 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3617 IncrementalHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1737 mSolverCounterUnsat, 610 mSDtfsCounter, 3617 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 350 SyntacticMatches, 14 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13004 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=899occurred in iteration=9, InterpolantAutomatonStates: 229, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 10 MinimizatonAttempts, 1050 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 676 NumberOfCodeBlocks, 676 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 682 ConstructedInterpolants, 0 QuantifiedInterpolants, 2206 SizeOfPredicates, 18 NumberOfNonLiveVariables, 724 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 165/226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-21 19:35:23,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9479837-5968-4fff-b63f-ac99505352b6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE