./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ --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 9cfe95aaca007f6467395901a9efc89e5ad27f0fc32ae7ae8a1fe4e27a1f35c1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:09,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:09,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:48:09,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:09,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:09,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:09,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:09,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:09,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:09,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:09,513 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:09,514 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:09,514 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:09,517 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:09,517 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:09,518 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:09,518 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:09,518 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:09,519 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:09,519 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:09,520 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:09,520 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:09,522 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:09,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:09,523 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:09,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:09,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:09,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:09,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:09,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:09,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:09,526 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:09,527 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:09,527 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:09,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:09,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:09,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:09,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:09,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:09,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:09,535 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:09,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:09,536 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:09,536 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:09,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:09,537 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_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cfe95aaca007f6467395901a9efc89e5ad27f0fc32ae7ae8a1fe4e27a1f35c1 [2023-11-19 04:48:09,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:09,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:09,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:09,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:09,913 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:09,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c [2023-11-19 04:48:13,266 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:13,677 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:13,678 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c [2023-11-19 04:48:13,693 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/data/d9205ae01/08ad73ff7ad14c23aebe51385efe2185/FLAGc14cb01e1 [2023-11-19 04:48:13,708 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/data/d9205ae01/08ad73ff7ad14c23aebe51385efe2185 [2023-11-19 04:48:13,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:13,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:13,714 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:13,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:13,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:13,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:13" (1/1) ... [2023-11-19 04:48:13,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4968005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:13, skipping insertion in model container [2023-11-19 04:48:13,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:13" (1/1) ... [2023-11-19 04:48:13,788 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:13,960 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_c7d67db9-507b-40e3-a619-2eae6b2f09f9/sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c[1605,1618] [2023-11-19 04:48:14,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:14,184 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:14,197 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [49] [2023-11-19 04:48:14,199 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [58] [2023-11-19 04:48:14,199 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [279] [2023-11-19 04:48:14,199 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [349] [2023-11-19 04:48:14,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [453] [2023-11-19 04:48:14,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [819] [2023-11-19 04:48:14,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [868] [2023-11-19 04:48:14,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [906] [2023-11-19 04:48:14,204 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_c7d67db9-507b-40e3-a619-2eae6b2f09f9/sv-benchmarks/c/product-lines/minepump_spec5_product50.cil.c[1605,1618] [2023-11-19 04:48:14,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:14,317 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:14,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14 WrapperNode [2023-11-19 04:48:14,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:14,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:14,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:14,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:14,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,395 INFO L138 Inliner]: procedures = 58, calls = 102, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 212 [2023-11-19 04:48:14,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:14,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:14,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:14,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:14,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:14,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:14,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:14,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:14,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (1/1) ... [2023-11-19 04:48:14,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:14,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:14,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:14,594 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:48:14,594 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:48:14,594 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:48:14,594 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:48:14,594 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:48:14,594 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:48:14,594 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:48:14,595 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:48:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:48:14,595 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:48:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-19 04:48:14,595 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-19 04:48:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:48:14,596 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:48:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:14,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:14,708 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:14,711 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:15,022 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:15,165 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:15,166 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:48:15,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:15 BoogieIcfgContainer [2023-11-19 04:48:15,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:15,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:15,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:15,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:15,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:13" (1/3) ... [2023-11-19 04:48:15,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34609720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:15, skipping insertion in model container [2023-11-19 04:48:15,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:14" (2/3) ... [2023-11-19 04:48:15,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34609720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:15, skipping insertion in model container [2023-11-19 04:48:15,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:15" (3/3) ... [2023-11-19 04:48:15,181 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product50.cil.c [2023-11-19 04:48:15,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:15,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:15,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:15,261 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;@6d44b9e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:15,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:48:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:48:15,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:15,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:15,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:15,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1743286310, now seen corresponding path program 1 times [2023-11-19 04:48:15,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:15,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441602667] [2023-11-19 04:48:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:15,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:15,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:15,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441602667] [2023-11-19 04:48:15,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441602667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:15,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:15,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812485348] [2023-11-19 04:48:15,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:48:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:48:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:48:15,620 INFO L87 Difference]: Start difference. First operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:48:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:15,723 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-11-19 04:48:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:48:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-19 04:48:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:15,737 INFO L225 Difference]: With dead ends: 114 [2023-11-19 04:48:15,737 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 04:48:15,742 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 [2023-11-19 04:48:15,747 INFO L413 NwaCegarLoop]: 57 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, 57 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 [2023-11-19 04:48:15,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 04:48:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-19 04:48:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 04:48:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2023-11-19 04:48:15,802 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 21 [2023-11-19 04:48:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:15,804 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2023-11-19 04:48:15,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:48:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2023-11-19 04:48:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:48:15,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:15,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:15,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:15,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:15,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1214263753, now seen corresponding path program 1 times [2023-11-19 04:48:15,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:15,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153727230] [2023-11-19 04:48:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:15,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153727230] [2023-11-19 04:48:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153727230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:15,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323622722] [2023-11-19 04:48:15,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:15,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:15,944 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:48:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:15,983 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2023-11-19 04:48:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-19 04:48:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:15,984 INFO L225 Difference]: With dead ends: 83 [2023-11-19 04:48:15,985 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:48:15,985 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 [2023-11-19 04:48:15,987 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 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 [2023-11-19 04:48:15,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:48:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-19 04:48:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 04:48:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-19 04:48:15,997 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 22 [2023-11-19 04:48:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:15,997 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-19 04:48:15,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:48:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-19 04:48:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:48:15,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:15,999 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:15,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:48:15,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:16,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:16,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1590286945, now seen corresponding path program 1 times [2023-11-19 04:48:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:16,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364662552] [2023-11-19 04:48:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:16,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364662552] [2023-11-19 04:48:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364662552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:16,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:48:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138679315] [2023-11-19 04:48:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:48:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:48:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:16,290 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:48:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:16,828 INFO L93 Difference]: Finished difference Result 180 states and 238 transitions. [2023-11-19 04:48:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 04:48:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-19 04:48:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:16,832 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:48:16,833 INFO L226 Difference]: Without dead ends: 137 [2023-11-19 04:48:16,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:48:16,836 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 84 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:16,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 403 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:48:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-19 04:48:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2023-11-19 04:48:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 98 states have internal predecessors, (109), 24 states have call successors, (24), 20 states have call predecessors, (24), 21 states have return successors, (36), 23 states have call predecessors, (36), 24 states have call successors, (36) [2023-11-19 04:48:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2023-11-19 04:48:16,867 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 24 [2023-11-19 04:48:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:16,868 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2023-11-19 04:48:16,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:48:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2023-11-19 04:48:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:48:16,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:16,871 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:48:16,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:48:16,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:16,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1850492991, now seen corresponding path program 1 times [2023-11-19 04:48:16,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:16,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648837135] [2023-11-19 04:48:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:16,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:17,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:17,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648837135] [2023-11-19 04:48:17,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648837135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:48:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180657361] [2023-11-19 04:48:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:17,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:48:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:48:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:17,239 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:48:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:17,566 INFO L93 Difference]: Finished difference Result 465 states and 622 transitions. [2023-11-19 04:48:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:48:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-11-19 04:48:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:17,581 INFO L225 Difference]: With dead ends: 465 [2023-11-19 04:48:17,581 INFO L226 Difference]: Without dead ends: 334 [2023-11-19 04:48:17,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:48:17,592 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 180 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:17,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 199 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-19 04:48:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 320. [2023-11-19 04:48:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 211 states have (on average 1.2511848341232228) internal successors, (264), 234 states have internal predecessors, (264), 59 states have call successors, (59), 50 states have call predecessors, (59), 49 states have return successors, (99), 52 states have call predecessors, (99), 59 states have call successors, (99) [2023-11-19 04:48:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 422 transitions. [2023-11-19 04:48:17,688 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 422 transitions. Word has length 32 [2023-11-19 04:48:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:17,690 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 422 transitions. [2023-11-19 04:48:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:48:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 422 transitions. [2023-11-19 04:48:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:48:17,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:17,700 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:48:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:48:17,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:17,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1031352483, now seen corresponding path program 1 times [2023-11-19 04:48:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:17,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144536670] [2023-11-19 04:48:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:17,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144536670] [2023-11-19 04:48:17,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144536670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:48:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371847077] [2023-11-19 04:48:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:48:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:48:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:17,932 INFO L87 Difference]: Start difference. First operand 320 states and 422 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:48:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:18,448 INFO L93 Difference]: Finished difference Result 994 states and 1324 transitions. [2023-11-19 04:48:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:48:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-19 04:48:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:18,455 INFO L225 Difference]: With dead ends: 994 [2023-11-19 04:48:18,456 INFO L226 Difference]: Without dead ends: 704 [2023-11-19 04:48:18,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:48:18,459 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:18,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 247 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:48:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2023-11-19 04:48:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2023-11-19 04:48:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 451 states have (on average 1.2439024390243902) internal successors, (561), 496 states have internal predecessors, (561), 112 states have call successors, (112), 87 states have call predecessors, (112), 102 states have return successors, (188), 112 states have call predecessors, (188), 112 states have call successors, (188) [2023-11-19 04:48:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 861 transitions. [2023-11-19 04:48:18,571 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 861 transitions. Word has length 35 [2023-11-19 04:48:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:18,572 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 861 transitions. [2023-11-19 04:48:18,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:48:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 861 transitions. [2023-11-19 04:48:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:48:18,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:18,577 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:48:18,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:18,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1664550782, now seen corresponding path program 1 times [2023-11-19 04:48:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:18,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96831807] [2023-11-19 04:48:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:48:18,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:18,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96831807] [2023-11-19 04:48:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96831807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596758589] [2023-11-19 04:48:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:18,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:18,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:18,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:18,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:48:18,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:19,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:48:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596758589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149650851] [2023-11-19 04:48:19,220 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-19 04:48:19,221 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:19,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:19,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:19,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:22,840 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 18 for LOIs [2023-11-19 04:48:22,847 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-11-19 04:48:23,128 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 37 for LOIs [2023-11-19 04:48:23,138 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:48:23,194 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:25,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4598#(and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2)) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2147483648)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (<= 0 ~pumpRunning~0) (= ~switchedOnBeforeTS~0 0) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|))' at error location [2023-11-19 04:48:25,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:25,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-11-19 04:48:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927090288] [2023-11-19 04:48:25,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:48:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:25,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:48:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 04:48:25,439 INFO L87 Difference]: Start difference. First operand 666 states and 861 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 04:48:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:26,012 INFO L93 Difference]: Finished difference Result 1680 states and 2273 transitions. [2023-11-19 04:48:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:48:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2023-11-19 04:48:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:26,019 INFO L225 Difference]: With dead ends: 1680 [2023-11-19 04:48:26,019 INFO L226 Difference]: Without dead ends: 857 [2023-11-19 04:48:26,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 04:48:26,026 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 204 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:26,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 419 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:48:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-11-19 04:48:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 794. [2023-11-19 04:48:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 529 states have (on average 1.2079395085066162) internal successors, (639), 590 states have internal predecessors, (639), 135 states have call successors, (135), 115 states have call predecessors, (135), 129 states have return successors, (241), 130 states have call predecessors, (241), 135 states have call successors, (241) [2023-11-19 04:48:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1015 transitions. [2023-11-19 04:48:26,155 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1015 transitions. Word has length 55 [2023-11-19 04:48:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:26,156 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1015 transitions. [2023-11-19 04:48:26,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 04:48:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1015 transitions. [2023-11-19 04:48:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:48:26,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:26,159 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:26,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:48:26,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:26,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1695750531, now seen corresponding path program 1 times [2023-11-19 04:48:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896948837] [2023-11-19 04:48:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:26,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:26,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896948837] [2023-11-19 04:48:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896948837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:26,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:48:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806043253] [2023-11-19 04:48:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:26,530 INFO L87 Difference]: Start difference. First operand 794 states and 1015 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:48:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:26,653 INFO L93 Difference]: Finished difference Result 1275 states and 1634 transitions. [2023-11-19 04:48:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2023-11-19 04:48:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:26,659 INFO L225 Difference]: With dead ends: 1275 [2023-11-19 04:48:26,659 INFO L226 Difference]: Without dead ends: 513 [2023-11-19 04:48:26,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:26,663 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-19 04:48:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2023-11-19 04:48:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 317 states have (on average 1.1577287066246056) internal successors, (367), 352 states have internal predecessors, (367), 84 states have call successors, (84), 74 states have call predecessors, (84), 80 states have return successors, (124), 80 states have call predecessors, (124), 84 states have call successors, (124) [2023-11-19 04:48:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 575 transitions. [2023-11-19 04:48:26,721 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 575 transitions. Word has length 57 [2023-11-19 04:48:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:26,722 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 575 transitions. [2023-11-19 04:48:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 04:48:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 575 transitions. [2023-11-19 04:48:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 04:48:26,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:26,724 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:48:26,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:26,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 638579201, now seen corresponding path program 1 times [2023-11-19 04:48:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:26,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613071293] [2023-11-19 04:48:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:27,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613071293] [2023-11-19 04:48:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613071293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763798714] [2023-11-19 04:48:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:27,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:27,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:27,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:27,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 04:48:27,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:48:27,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:48:28,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763798714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431517739] [2023-11-19 04:48:28,173 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-11-19 04:48:28,173 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:28,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:28,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:28,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:36,244 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 138 for LOIs [2023-11-19 04:48:36,369 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 33 for LOIs [2023-11-19 04:48:37,389 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 8 for LOIs [2023-11-19 04:48:37,390 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:48:37,464 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 30 for LOIs [2023-11-19 04:48:37,469 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:41,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10770#(and (<= 0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= ~pumpRunning~0 1) (or (and (exists ((|v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_8| Int) (|v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_8| Int) (|v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_8| Int)) (and (<= 0 |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_8|) (<= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_8| 1) (<= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_8| 1) (or (= |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_8| 1) (and (= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_8| 1) (= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_8| 0))) (<= |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_8| 1) (<= 0 |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_8|) (<= 0 |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_8|))) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (exists ((|v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| Int)) (and (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483648)) (or (and (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 0) (<= |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| 2147483648))) (and (= 1 ~systemActive~0) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 0)))))) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |old(~waterLevel~0)| ~waterLevel~0) (not (= 0 ~systemActive~0)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|)) (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (exists ((|v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| Int)) (and (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483648)) (or (and (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 0) (<= |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_18| 2147483648))) (and (= 1 ~systemActive~0) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 0)))))) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2)) (exists ((|v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_7| Int) (|v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_7| Int) (|v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_7| Int)) (and (or (and (= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_7| 0) (= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_7| 1)) (= |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_7| 1)) (<= 0 |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_7|) (<= |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_7| 1) (<= 0 |v_processEnvironment__wrappee__highWaterSensor_~tmp~0#1_BEFORE_RETURN_7|) (<= 0 |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_7|) (<= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1_BEFORE_RETURN_7| 1) (<= |v_processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1_BEFORE_RETURN_7| 1))) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |old(~waterLevel~0)| ~waterLevel~0) (not (= 0 ~systemActive~0)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|))) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (= |old(~pumpRunning~0)| 0) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2147483647) (= ~switchedOnBeforeTS~0 0) (= |old(~switchedOnBeforeTS~0)| 0))' at error location [2023-11-19 04:48:41,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:41,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2023-11-19 04:48:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461562217] [2023-11-19 04:48:41,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:48:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:48:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 04:48:41,774 INFO L87 Difference]: Start difference. First operand 482 states and 575 transitions. Second operand has 21 states, 18 states have (on average 5.277777777777778) internal successors, (95), 21 states have internal predecessors, (95), 12 states have call successors, (26), 8 states have call predecessors, (26), 10 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-19 04:48:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:43,745 INFO L93 Difference]: Finished difference Result 1467 states and 1891 transitions. [2023-11-19 04:48:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-19 04:48:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 5.277777777777778) internal successors, (95), 21 states have internal predecessors, (95), 12 states have call successors, (26), 8 states have call predecessors, (26), 10 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 68 [2023-11-19 04:48:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:43,764 INFO L225 Difference]: With dead ends: 1467 [2023-11-19 04:48:43,764 INFO L226 Difference]: Without dead ends: 1066 [2023-11-19 04:48:43,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=865, Invalid=6107, Unknown=0, NotChecked=0, Total=6972 [2023-11-19 04:48:43,771 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 739 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:43,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 740 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:48:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2023-11-19 04:48:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 809. [2023-11-19 04:48:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 532 states have (on average 1.1654135338345866) internal successors, (620), 589 states have internal predecessors, (620), 141 states have call successors, (141), 125 states have call predecessors, (141), 135 states have return successors, (220), 134 states have call predecessors, (220), 141 states have call successors, (220) [2023-11-19 04:48:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 981 transitions. [2023-11-19 04:48:43,926 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 981 transitions. Word has length 68 [2023-11-19 04:48:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,927 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 981 transitions. [2023-11-19 04:48:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 5.277777777777778) internal successors, (95), 21 states have internal predecessors, (95), 12 states have call successors, (26), 8 states have call predecessors, (26), 10 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-19 04:48:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 981 transitions. [2023-11-19 04:48:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 04:48:43,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,930 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:43,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:44,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:44,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1890912808, now seen corresponding path program 1 times [2023-11-19 04:48:44,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:44,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495969934] [2023-11-19 04:48:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:48:45,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495969934] [2023-11-19 04:48:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495969934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871650312] [2023-11-19 04:48:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:45,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:45,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 04:48:45,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 53 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:48:45,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:48:46,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871650312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:46,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010219280] [2023-11-19 04:48:46,345 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-19 04:48:46,345 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:46,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:46,346 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:46,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:52,081 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 18 for LOIs [2023-11-19 04:48:52,085 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-11-19 04:48:52,276 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 37 for LOIs [2023-11-19 04:48:52,286 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:48:52,330 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:55,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14531#(and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= 0 |old(~pumpRunning~0)|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 1) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= 0 (+ ~waterLevel~0 2147483648)) (<= 0 ~pumpRunning~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~8#1| 2147483647) (= ~switchedOnBeforeTS~0 0) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|))' at error location [2023-11-19 04:48:55,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:55,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:55,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 11] total 31 [2023-11-19 04:48:55,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159023089] [2023-11-19 04:48:55,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-19 04:48:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-19 04:48:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3261, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 04:48:55,192 INFO L87 Difference]: Start difference. First operand 809 states and 981 transitions. Second operand has 31 states, 30 states have (on average 4.6) internal successors, (138), 30 states have internal predecessors, (138), 15 states have call successors, (26), 8 states have call predecessors, (26), 12 states have return successors, (25), 17 states have call predecessors, (25), 15 states have call successors, (25) [2023-11-19 04:48:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:58,302 INFO L93 Difference]: Finished difference Result 1873 states and 2298 transitions. [2023-11-19 04:48:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-19 04:48:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.6) internal successors, (138), 30 states have internal predecessors, (138), 15 states have call successors, (26), 8 states have call predecessors, (26), 12 states have return successors, (25), 17 states have call predecessors, (25), 15 states have call successors, (25) Word has length 85 [2023-11-19 04:48:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:58,316 INFO L225 Difference]: With dead ends: 1873 [2023-11-19 04:48:58,316 INFO L226 Difference]: Without dead ends: 1145 [2023-11-19 04:48:58,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 245 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4601 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1448, Invalid=11434, Unknown=0, NotChecked=0, Total=12882 [2023-11-19 04:48:58,328 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 1199 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:58,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 860 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 04:48:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2023-11-19 04:48:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 867. [2023-11-19 04:48:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 575 states have (on average 1.1495652173913042) internal successors, (661), 631 states have internal predecessors, (661), 147 states have call successors, (147), 132 states have call predecessors, (147), 144 states have return successors, (195), 139 states have call predecessors, (195), 147 states have call successors, (195) [2023-11-19 04:48:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1003 transitions. [2023-11-19 04:48:58,460 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1003 transitions. Word has length 85 [2023-11-19 04:48:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1003 transitions. [2023-11-19 04:48:58,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.6) internal successors, (138), 30 states have internal predecessors, (138), 15 states have call successors, (26), 8 states have call predecessors, (26), 12 states have return successors, (25), 17 states have call predecessors, (25), 15 states have call successors, (25) [2023-11-19 04:48:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1003 transitions. [2023-11-19 04:48:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 04:48:58,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:58,470 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:58,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:58,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1244780722, now seen corresponding path program 1 times [2023-11-19 04:48:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122161054] [2023-11-19 04:48:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:58,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 33 proven. 86 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 04:49:00,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122161054] [2023-11-19 04:49:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122161054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110516653] [2023-11-19 04:49:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:00,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:00,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:00,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:00,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d67db9-507b-40e3-a619-2eae6b2f09f9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:49:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:00,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:49:00,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 131 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:49:00,652 INFO L327 TraceCheckSpWp]: Computing backward predicates...