./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire --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 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:21:18,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:21:19,046 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:21:19,054 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:21:19,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:21:19,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:21:19,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:21:19,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:21:19,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:21:19,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:21:19,108 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:21:19,110 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:21:19,110 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:21:19,113 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:21:19,113 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:21:19,114 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:21:19,114 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:21:19,115 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:21:19,116 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:21:19,116 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:21:19,117 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:21:19,118 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:21:19,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:21:19,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:21:19,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:21:19,121 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:21:19,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:21:19,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:21:19,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:21:19,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:21:19,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:21:19,126 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:21:19,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:21:19,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:21:19,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:21:19,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:21:19,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:21:19,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:21:19,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:21:19,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:21:19,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:21:19,129 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:21:19,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:21:19,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:21:19,130 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:21:19,130 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:21:19,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:21:19,131 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_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f [2023-11-23 21:21:19,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:21:19,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:21:19,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:21:19,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:21:19,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:21:19,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2023-11-23 21:21:22,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:21:23,163 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:21:23,164 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2023-11-23 21:21:23,177 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/data/d1a952cff/46ada7a910c142c6a4673eccf83a21b3/FLAGad3418c8d [2023-11-23 21:21:23,192 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/data/d1a952cff/46ada7a910c142c6a4673eccf83a21b3 [2023-11-23 21:21:23,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:21:23,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:21:23,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:23,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:21:23,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:21:23,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63515d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23, skipping insertion in model container [2023-11-23 21:21:23,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,287 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:21:23,587 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_99a87831-b874-405d-b1b3-9269f71a7918/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2023-11-23 21:21:23,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:23,658 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:21:23,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [49] [2023-11-23 21:21:23,671 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [87] [2023-11-23 21:21:23,672 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [188] [2023-11-23 21:21:23,672 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [554] [2023-11-23 21:21:23,672 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [583] [2023-11-23 21:21:23,673 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [592] [2023-11-23 21:21:23,673 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [839] [2023-11-23 21:21:23,673 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [908] [2023-11-23 21:21:23,755 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_99a87831-b874-405d-b1b3-9269f71a7918/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2023-11-23 21:21:23,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:23,806 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:21:23,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23 WrapperNode [2023-11-23 21:21:23,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:23,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:23,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:21:23,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:21:23,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,877 INFO L138 Inliner]: procedures = 58, calls = 103, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 233 [2023-11-23 21:21:23,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:23,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:21:23,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:21:23,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:21:23,888 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,905 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:21:23,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:21:23,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:21:23,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:21:23,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (1/1) ... [2023-11-23 21:21:23,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:21:23,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:23,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:21:23,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:21:24,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:21:24,029 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:21:24,029 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:21:24,029 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:21:24,030 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:21:24,030 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:21:24,030 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:21:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:21:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:21:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:21:24,032 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:21:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:21:24,033 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:21:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:21:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:21:24,036 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:21:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:21:24,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:21:24,129 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:21:24,133 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:21:24,501 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:21:24,672 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:21:24,672 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:21:24,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:24 BoogieIcfgContainer [2023-11-23 21:21:24,675 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:21:24,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:21:24,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:21:24,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:21:24,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:23" (1/3) ... [2023-11-23 21:21:24,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d45f0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:24, skipping insertion in model container [2023-11-23 21:21:24,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:23" (2/3) ... [2023-11-23 21:21:24,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d45f0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:24, skipping insertion in model container [2023-11-23 21:21:24,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:24" (3/3) ... [2023-11-23 21:21:24,687 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product60.cil.c [2023-11-23 21:21:24,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:21:24,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:21:24,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:21:24,790 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;@4c49c7e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:21:24,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:21:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:21:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:21:24,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:24,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:24,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:24,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:24,821 INFO L85 PathProgramCache]: Analyzing trace with hash -167949414, now seen corresponding path program 1 times [2023-11-23 21:21:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558087733] [2023-11-23 21:21:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:25,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558087733] [2023-11-23 21:21:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558087733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:25,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:21:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258112347] [2023-11-23 21:21:25,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:25,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:21:25,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:25,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:21:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:21:25,130 INFO L87 Difference]: Start difference. First operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:25,240 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2023-11-23 21:21:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:21:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 21:21:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:25,257 INFO L225 Difference]: With dead ends: 116 [2023-11-23 21:21:25,258 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 21:21:25,264 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 [2023-11-23 21:21:25,271 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:25,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 21:21:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-23 21:21:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:21:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2023-11-23 21:21:25,336 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 12 [2023-11-23 21:21:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:25,336 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2023-11-23 21:21:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2023-11-23 21:21:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:21:25,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:25,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:21:25,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:25,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -306223596, now seen corresponding path program 1 times [2023-11-23 21:21:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395073479] [2023-11-23 21:21:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:25,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:25,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395073479] [2023-11-23 21:21:25,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395073479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:25,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:21:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555804689] [2023-11-23 21:21:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:21:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:21:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:21:25,507 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:25,557 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2023-11-23 21:21:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:21:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:21:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:25,560 INFO L225 Difference]: With dead ends: 80 [2023-11-23 21:21:25,560 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 21:21:25,561 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 [2023-11-23 21:21:25,563 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:25,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 21:21:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-23 21:21:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:21:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-11-23 21:21:25,576 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 13 [2023-11-23 21:21:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:25,577 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-23 21:21:25,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-11-23 21:21:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:21:25,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:25,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:25,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:21:25,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:25,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 201688176, now seen corresponding path program 1 times [2023-11-23 21:21:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167669366] [2023-11-23 21:21:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:25,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:25,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167669366] [2023-11-23 21:21:25,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167669366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:25,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648816865] [2023-11-23 21:21:25,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:25,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:21:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:21:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:21:25,712 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:25,838 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2023-11-23 21:21:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:21:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 21:21:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:25,841 INFO L225 Difference]: With dead ends: 119 [2023-11-23 21:21:25,842 INFO L226 Difference]: Without dead ends: 75 [2023-11-23 21:21:25,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:21:25,845 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:25,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 101 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-23 21:21:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-11-23 21:21:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-23 21:21:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-23 21:21:25,865 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 16 [2023-11-23 21:21:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:25,866 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-23 21:21:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-23 21:21:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:21:25,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:25,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:21:25,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:25,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash -89645741, now seen corresponding path program 1 times [2023-11-23 21:21:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441997256] [2023-11-23 21:21:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:26,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:26,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441997256] [2023-11-23 21:21:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441997256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:26,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:26,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:26,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636922691] [2023-11-23 21:21:26,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:26,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:21:26,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:26,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:21:26,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:21:26,128 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:26,355 INFO L93 Difference]: Finished difference Result 222 states and 298 transitions. [2023-11-23 21:21:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:21:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:21:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:26,363 INFO L225 Difference]: With dead ends: 222 [2023-11-23 21:21:26,363 INFO L226 Difference]: Without dead ends: 152 [2023-11-23 21:21:26,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:21:26,369 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:26,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 152 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-23 21:21:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2023-11-23 21:21:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 116 states have internal predecessors, (135), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (26), 19 states have call predecessors, (26), 21 states have call successors, (26) [2023-11-23 21:21:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2023-11-23 21:21:26,407 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 19 [2023-11-23 21:21:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:26,408 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2023-11-23 21:21:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2023-11-23 21:21:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:21:26,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:26,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:21:26,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:26,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2048503446, now seen corresponding path program 1 times [2023-11-23 21:21:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435066022] [2023-11-23 21:21:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:26,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435066022] [2023-11-23 21:21:26,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435066022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:26,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:21:26,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718424674] [2023-11-23 21:21:26,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:21:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:21:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:21:26,695 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:27,275 INFO L93 Difference]: Finished difference Result 396 states and 525 transitions. [2023-11-23 21:21:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:21:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-23 21:21:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:27,293 INFO L225 Difference]: With dead ends: 396 [2023-11-23 21:21:27,294 INFO L226 Difference]: Without dead ends: 326 [2023-11-23 21:21:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:21:27,301 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 181 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:27,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 270 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:21:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-23 21:21:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2023-11-23 21:21:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 207 states have (on average 1.3043478260869565) internal successors, (270), 234 states have internal predecessors, (270), 42 states have call successors, (42), 36 states have call predecessors, (42), 41 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-23 21:21:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 367 transitions. [2023-11-23 21:21:27,383 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 367 transitions. Word has length 22 [2023-11-23 21:21:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:27,384 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 367 transitions. [2023-11-23 21:21:27,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 367 transitions. [2023-11-23 21:21:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:21:27,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:27,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:21:27,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1529385137, now seen corresponding path program 1 times [2023-11-23 21:21:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867421249] [2023-11-23 21:21:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:27,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867421249] [2023-11-23 21:21:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867421249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:27,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:27,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805404374] [2023-11-23 21:21:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:27,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:21:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:21:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:21:27,483 INFO L87 Difference]: Start difference. First operand 291 states and 367 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-11-23 21:21:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:27,655 INFO L93 Difference]: Finished difference Result 589 states and 740 transitions. [2023-11-23 21:21:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:21:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 47 [2023-11-23 21:21:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:27,659 INFO L225 Difference]: With dead ends: 589 [2023-11-23 21:21:27,660 INFO L226 Difference]: Without dead ends: 300 [2023-11-23 21:21:27,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:21:27,663 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 82 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:27,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 108 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-23 21:21:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 277. [2023-11-23 21:21:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 198 states have (on average 1.2777777777777777) internal successors, (253), 222 states have internal predecessors, (253), 38 states have call successors, (38), 35 states have call predecessors, (38), 40 states have return successors, (44), 39 states have call predecessors, (44), 38 states have call successors, (44) [2023-11-23 21:21:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 335 transitions. [2023-11-23 21:21:27,738 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 335 transitions. Word has length 47 [2023-11-23 21:21:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:27,739 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 335 transitions. [2023-11-23 21:21:27,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-11-23 21:21:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 335 transitions. [2023-11-23 21:21:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:21:27,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:27,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:27,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:21:27,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:27,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash 196163820, now seen corresponding path program 1 times [2023-11-23 21:21:27,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:27,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828580384] [2023-11-23 21:21:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:27,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:28,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:28,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828580384] [2023-11-23 21:21:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828580384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:28,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:21:28,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714603840] [2023-11-23 21:21:28,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:28,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:21:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:21:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:21:28,219 INFO L87 Difference]: Start difference. First operand 277 states and 335 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:21:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:28,521 INFO L93 Difference]: Finished difference Result 421 states and 524 transitions. [2023-11-23 21:21:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:21:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2023-11-23 21:21:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:28,524 INFO L225 Difference]: With dead ends: 421 [2023-11-23 21:21:28,524 INFO L226 Difference]: Without dead ends: 275 [2023-11-23 21:21:28,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:21:28,526 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 141 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:28,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 138 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:21:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-23 21:21:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 220. [2023-11-23 21:21:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 156 states have (on average 1.294871794871795) internal successors, (202), 176 states have internal predecessors, (202), 31 states have call successors, (31), 28 states have call predecessors, (31), 32 states have return successors, (36), 31 states have call predecessors, (36), 31 states have call successors, (36) [2023-11-23 21:21:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2023-11-23 21:21:28,577 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 44 [2023-11-23 21:21:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:28,577 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2023-11-23 21:21:28,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:21:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2023-11-23 21:21:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:21:28,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:28,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:28,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:21:28,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:28,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1319794423, now seen corresponding path program 1 times [2023-11-23 21:21:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:28,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732512270] [2023-11-23 21:21:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:29,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732512270] [2023-11-23 21:21:29,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732512270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856572743] [2023-11-23 21:21:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:29,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:29,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:21:29,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:21:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:29,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:21:29,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:21:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:29,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:21:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:21:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856572743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:21:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356258702] [2023-11-23 21:21:30,066 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-23 21:21:30,066 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:21:30,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:21:30,075 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:21:30,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:21:42,132 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 16 for LOIs [2023-11-23 21:21:42,138 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 150 for LOIs [2023-11-23 21:21:46,411 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 146 for LOIs [2023-11-23 21:21:47,874 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 25 for LOIs [2023-11-23 21:21:47,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:21:56,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4442#(and (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= 0 ~pumpRunning~0) (= ~waterLevel~0 0))' at error location [2023-11-23 21:21:56,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:21:56,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:21:56,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 27 [2023-11-23 21:21:56,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121245310] [2023-11-23 21:21:56,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:21:56,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 21:21:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 21:21:56,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2630, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 21:21:56,431 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand has 27 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 10 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-23 21:22:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:03,870 INFO L93 Difference]: Finished difference Result 2025 states and 2705 transitions. [2023-11-23 21:22:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-11-23 21:22:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 10 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 47 [2023-11-23 21:22:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:03,895 INFO L225 Difference]: With dead ends: 2025 [2023-11-23 21:22:03,896 INFO L226 Difference]: Without dead ends: 1856 [2023-11-23 21:22:03,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13876 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4622, Invalid=29050, Unknown=0, NotChecked=0, Total=33672 [2023-11-23 21:22:03,920 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 1348 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:03,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 1134 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:22:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2023-11-23 21:22:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1221. [2023-11-23 21:22:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 909 states have (on average 1.3212321232123212) internal successors, (1201), 971 states have internal predecessors, (1201), 142 states have call successors, (142), 124 states have call predecessors, (142), 169 states have return successors, (243), 177 states have call predecessors, (243), 142 states have call successors, (243) [2023-11-23 21:22:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1586 transitions. [2023-11-23 21:22:04,122 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1586 transitions. Word has length 47 [2023-11-23 21:22:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:04,123 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1586 transitions. [2023-11-23 21:22:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 10 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-23 21:22:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1586 transitions. [2023-11-23 21:22:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:22:04,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:04,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 21:22:04,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:22:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:22:04,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1061282426, now seen corresponding path program 1 times [2023-11-23 21:22:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068812201] [2023-11-23 21:22:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:04,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:22:05,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068812201] [2023-11-23 21:22:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068812201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:22:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611827352] [2023-11-23 21:22:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:22:05,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:05,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:22:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:22:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:05,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:22:05,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:22:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:22:05,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:22:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611827352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:05,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:22:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 19 [2023-11-23 21:22:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740012762] [2023-11-23 21:22:05,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:22:05,498 INFO L87 Difference]: Start difference. First operand 1221 states and 1586 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:22:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:05,712 INFO L93 Difference]: Finished difference Result 2026 states and 2737 transitions. [2023-11-23 21:22:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2023-11-23 21:22:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:05,723 INFO L225 Difference]: With dead ends: 2026 [2023-11-23 21:22:05,724 INFO L226 Difference]: Without dead ends: 1241 [2023-11-23 21:22:05,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:22:05,730 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 119 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:22:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-11-23 21:22:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1204. [2023-11-23 21:22:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 894 states have (on average 1.3064876957494407) internal successors, (1168), 954 states have internal predecessors, (1168), 149 states have call successors, (149), 130 states have call predecessors, (149), 160 states have return successors, (234), 168 states have call predecessors, (234), 149 states have call successors, (234) [2023-11-23 21:22:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1551 transitions. [2023-11-23 21:22:05,894 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1551 transitions. Word has length 64 [2023-11-23 21:22:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:05,897 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1551 transitions. [2023-11-23 21:22:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:22:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1551 transitions. [2023-11-23 21:22:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:22:05,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:05,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:05,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:22:06,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:22:06,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:06,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1615068099, now seen corresponding path program 1 times [2023-11-23 21:22:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:06,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317522232] [2023-11-23 21:22:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:06,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:22:07,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317522232] [2023-11-23 21:22:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317522232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:22:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531204568] [2023-11-23 21:22:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:07,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:22:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:07,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:22:07,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99a87831-b874-405d-b1b3-9269f71a7918/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:22:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:07,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:22:07,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:22:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:22:07,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:22:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:22:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531204568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:22:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867120964] [2023-11-23 21:22:07,849 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-11-23 21:22:07,849 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:22:07,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:22:07,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:22:07,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:22:11,407 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 14 for LOIs [2023-11-23 21:22:11,412 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 12 for LOIs [2023-11-23 21:22:11,513 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 12 for LOIs [2023-11-23 21:22:11,545 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 3 for LOIs [2023-11-23 21:22:11,547 INFO L180 IcfgInterpreter]: Interpretation finished