./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/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_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/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_69dbbfa4-0118-45f4-97f1-80d38f9fa235/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 7c7779f94f1738e754b88f9a8a8e36de7065a4e94578f4135106bd0ff9ddb13d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:52,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:52,787 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:19:52,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:52,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:52,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:52,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:52,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:52,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:52,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:52,841 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:52,841 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:52,842 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:52,843 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:52,844 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:52,844 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:52,844 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:52,845 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:52,845 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:52,845 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:52,846 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:52,846 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:52,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:52,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:52,848 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:19:52,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:52,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:19:52,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:52,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:52,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:52,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:52,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:19:52,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:52,853 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:52,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:52,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:52,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:52,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:52,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:52,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:52,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:52,855 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:52,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:52,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:52,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:52,856 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:52,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:52,856 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_69dbbfa4-0118-45f4-97f1-80d38f9fa235/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c7779f94f1738e754b88f9a8a8e36de7065a4e94578f4135106bd0ff9ddb13d [2023-11-23 21:19:53,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:53,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:53,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:53,216 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:53,216 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:53,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c [2023-11-23 21:19:56,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:56,499 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:56,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c [2023-11-23 21:19:56,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/data/2cb0ea875/ab132c57452e489fbae58be477cb06e0/FLAG58f19f86e [2023-11-23 21:19:56,539 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/data/2cb0ea875/ab132c57452e489fbae58be477cb06e0 [2023-11-23 21:19:56,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:56,543 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:56,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:56,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:56,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:56,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:56" (1/1) ... [2023-11-23 21:19:56,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68aae5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:56, skipping insertion in model container [2023-11-23 21:19:56,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:56" (1/1) ... [2023-11-23 21:19:56,602 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:56,890 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_69dbbfa4-0118-45f4-97f1-80d38f9fa235/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c[15018,15031] [2023-11-23 21:19:56,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:56,922 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:56,933 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-23 21:19:56,934 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [415] [2023-11-23 21:19:56,935 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [519] [2023-11-23 21:19:56,935 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [554] [2023-11-23 21:19:56,935 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [583] [2023-11-23 21:19:56,935 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [691] [2023-11-23 21:19:56,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [700] [2023-11-23 21:19:56,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [958] [2023-11-23 21:19:56,998 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_69dbbfa4-0118-45f4-97f1-80d38f9fa235/sv-benchmarks/c/product-lines/minepump_spec4_product63.cil.c[15018,15031] [2023-11-23 21:19:57,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:57,034 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:57,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57 WrapperNode [2023-11-23 21:19:57,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:57,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:57,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:57,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:57,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,096 INFO L138 Inliner]: procedures = 58, calls = 106, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 241 [2023-11-23 21:19:57,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:57,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:57,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:57,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:57,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:57,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:57,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:57,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:57,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (1/1) ... [2023-11-23 21:19:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:57,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:57,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:57,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:19:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:19:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:19:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:19:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:19:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:19:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:19:57,245 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:19:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:19:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:19:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:19:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:19:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-23 21:19:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-23 21:19:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:19:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:19:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:19:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:19:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:57,382 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:57,385 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:57,804 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:57,923 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:57,923 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:19:57,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:57 BoogieIcfgContainer [2023-11-23 21:19:57,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:57,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:57,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:57,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:57,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:56" (1/3) ... [2023-11-23 21:19:57,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3922471f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:57, skipping insertion in model container [2023-11-23 21:19:57,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:57" (2/3) ... [2023-11-23 21:19:57,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3922471f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:57, skipping insertion in model container [2023-11-23 21:19:57,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:57" (3/3) ... [2023-11-23 21:19:57,951 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product63.cil.c [2023-11-23 21:19:57,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:57,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:19:58,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:58,067 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;@107d9b97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:58,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:19:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 21:19:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:19:58,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:58,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:58,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:58,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2033655671, now seen corresponding path program 1 times [2023-11-23 21:19:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:58,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115573840] [2023-11-23 21:19:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:58,268 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 21:19:58,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:58,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115573840] [2023-11-23 21:19:58,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115573840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:58,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:58,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:58,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761192875] [2023-11-23 21:19:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:19:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:19:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:19:58,310 INFO L87 Difference]: Start difference. First operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:58,379 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-23 21:19:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:19:58,382 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 21:19:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:58,391 INFO L225 Difference]: With dead ends: 144 [2023-11-23 21:19:58,392 INFO L226 Difference]: Without dead ends: 68 [2023-11-23 21:19:58,396 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 21:19:58,399 INFO L413 NwaCegarLoop]: 78 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, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:58,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:19:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-23 21:19:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-23 21:19:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 52 states have internal predecessors, (57), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 21:19:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2023-11-23 21:19:58,471 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 12 [2023-11-23 21:19:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:58,472 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2023-11-23 21:19:58,473 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 21:19:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2023-11-23 21:19:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:19:58,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:58,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:58,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:58,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 627374081, now seen corresponding path program 1 times [2023-11-23 21:19:58,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:58,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507180977] [2023-11-23 21:19:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:58,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:58,634 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 21:19:58,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:58,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507180977] [2023-11-23 21:19:58,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507180977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:58,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:58,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:58,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226158806] [2023-11-23 21:19:58,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:58,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:58,639 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:58,710 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2023-11-23 21:19:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:58,710 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 21:19:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:58,712 INFO L225 Difference]: With dead ends: 108 [2023-11-23 21:19:58,712 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 21:19:58,713 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 21:19:58,715 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:58,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 111 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:19:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 21:19:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-23 21:19:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 47 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:19:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-23 21:19:58,736 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2023-11-23 21:19:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:58,737 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-23 21:19:58,737 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 21:19:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-23 21:19:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:19:58,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:58,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:58,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:58,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:58,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2128038948, now seen corresponding path program 1 times [2023-11-23 21:19:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083526420] [2023-11-23 21:19:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:58,908 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 21:19:58,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083526420] [2023-11-23 21:19:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083526420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:58,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:58,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989718764] [2023-11-23 21:19:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:19:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:19:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:19:58,911 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:59,065 INFO L93 Difference]: Finished difference Result 161 states and 218 transitions. [2023-11-23 21:19:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:19:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 21:19:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:59,068 INFO L225 Difference]: With dead ends: 161 [2023-11-23 21:19:59,069 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 21:19:59,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:59,071 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 92 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:59,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 21:19:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2023-11-23 21:19:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (19), 12 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:19:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2023-11-23 21:19:59,091 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 16 [2023-11-23 21:19:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:59,092 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2023-11-23 21:19:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2023-11-23 21:19:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:19:59,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:59,094 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 21:19:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:19:59,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:59,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 333125851, now seen corresponding path program 1 times [2023-11-23 21:19:59,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444262720] [2023-11-23 21:19:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:59,296 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 21:19:59,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444262720] [2023-11-23 21:19:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444262720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:19:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336715897] [2023-11-23 21:19:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:19:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:19:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:59,300 INFO L87 Difference]: Start difference. First operand 86 states and 113 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 21:19:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:59,531 INFO L93 Difference]: Finished difference Result 261 states and 349 transitions. [2023-11-23 21:19:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:19:59,532 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 21:19:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:59,535 INFO L225 Difference]: With dead ends: 261 [2023-11-23 21:19:59,535 INFO L226 Difference]: Without dead ends: 177 [2023-11-23 21:19:59,536 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 21:19:59,538 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 89 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:59,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 205 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:19:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-23 21:19:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2023-11-23 21:19:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 131 states have internal predecessors, (150), 28 states have call successors, (28), 22 states have call predecessors, (28), 25 states have return successors, (34), 25 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-23 21:19:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 212 transitions. [2023-11-23 21:19:59,572 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 212 transitions. Word has length 19 [2023-11-23 21:19:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:59,573 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 212 transitions. [2023-11-23 21:19:59,573 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 21:19:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 212 transitions. [2023-11-23 21:19:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:19:59,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:59,580 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 21:19:59,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:19:59,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:59,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:59,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1890710108, now seen corresponding path program 1 times [2023-11-23 21:19:59,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:59,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577561619] [2023-11-23 21:19:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:59,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:59,845 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 21:19:59,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:59,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577561619] [2023-11-23 21:19:59,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577561619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:59,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:59,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:19:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149614780] [2023-11-23 21:19:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:59,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:19:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:19:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:19:59,849 INFO L87 Difference]: Start difference. First operand 168 states and 212 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 21:20:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,364 INFO L93 Difference]: Finished difference Result 457 states and 600 transitions. [2023-11-23 21:20:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:20:00,365 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 21:20:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,376 INFO L225 Difference]: With dead ends: 457 [2023-11-23 21:20:00,376 INFO L226 Difference]: Without dead ends: 373 [2023-11-23 21:20:00,379 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 21:20:00,382 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 253 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 288 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:20:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-23 21:20:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 334. [2023-11-23 21:20:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 230 states have (on average 1.2826086956521738) internal successors, (295), 259 states have internal predecessors, (295), 53 states have call successors, (53), 43 states have call predecessors, (53), 50 states have return successors, (69), 51 states have call predecessors, (69), 53 states have call successors, (69) [2023-11-23 21:20:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 417 transitions. [2023-11-23 21:20:00,481 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 417 transitions. Word has length 22 [2023-11-23 21:20:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,482 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 417 transitions. [2023-11-23 21:20:00,482 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 21:20:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 417 transitions. [2023-11-23 21:20:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:20:00,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:20:00,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1996704669, now seen corresponding path program 1 times [2023-11-23 21:20:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479153982] [2023-11-23 21:20:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:00,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:00,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479153982] [2023-11-23 21:20:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479153982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:00,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:00,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:20:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653890597] [2023-11-23 21:20:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:00,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:20:00,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:20:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:20:00,898 INFO L87 Difference]: Start difference. First operand 334 states and 417 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:20:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:01,275 INFO L93 Difference]: Finished difference Result 506 states and 655 transitions. [2023-11-23 21:20:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:20:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2023-11-23 21:20:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:01,280 INFO L225 Difference]: With dead ends: 506 [2023-11-23 21:20:01,281 INFO L226 Difference]: Without dead ends: 335 [2023-11-23 21:20:01,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 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 21:20:01,284 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 143 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:01,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-11-23 21:20:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 276. [2023-11-23 21:20:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 189 states have (on average 1.3015873015873016) internal successors, (246), 214 states have internal predecessors, (246), 44 states have call successors, (44), 35 states have call predecessors, (44), 42 states have return successors, (60), 42 states have call predecessors, (60), 44 states have call successors, (60) [2023-11-23 21:20:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 350 transitions. [2023-11-23 21:20:01,336 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 350 transitions. Word has length 53 [2023-11-23 21:20:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:01,337 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 350 transitions. [2023-11-23 21:20:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:20:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 350 transitions. [2023-11-23 21:20:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 21:20:01,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:01,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:01,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:20:01,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:01,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1411634325, now seen corresponding path program 1 times [2023-11-23 21:20:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935491812] [2023-11-23 21:20:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:20:01,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:01,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935491812] [2023-11-23 21:20:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935491812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:01,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:20:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509558549] [2023-11-23 21:20:01,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:01,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:20:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:20:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:20:01,507 INFO L87 Difference]: Start difference. First operand 276 states and 350 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:20:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:01,694 INFO L93 Difference]: Finished difference Result 662 states and 856 transitions. [2023-11-23 21:20:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:20:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2023-11-23 21:20:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:01,699 INFO L225 Difference]: With dead ends: 662 [2023-11-23 21:20:01,699 INFO L226 Difference]: Without dead ends: 548 [2023-11-23 21:20:01,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:20:01,701 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:01,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 279 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:20:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-23 21:20:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 522. [2023-11-23 21:20:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 367 states have (on average 1.3051771117166213) internal successors, (479), 406 states have internal predecessors, (479), 78 states have call successors, (78), 62 states have call predecessors, (78), 76 states have return successors, (110), 76 states have call predecessors, (110), 78 states have call successors, (110) [2023-11-23 21:20:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 667 transitions. [2023-11-23 21:20:01,773 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 667 transitions. Word has length 60 [2023-11-23 21:20:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:01,773 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 667 transitions. [2023-11-23 21:20:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:20:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 667 transitions. [2023-11-23 21:20:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:20:01,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:01,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:20:01,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -356658417, now seen corresponding path program 1 times [2023-11-23 21:20:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076277001] [2023-11-23 21:20:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:20:01,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:01,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076277001] [2023-11-23 21:20:01,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076277001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:01,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:01,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:01,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481361500] [2023-11-23 21:20:01,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:01,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:01,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:01,831 INFO L87 Difference]: Start difference. First operand 522 states and 667 transitions. Second operand has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 21:20:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:01,997 INFO L93 Difference]: Finished difference Result 1062 states and 1353 transitions. [2023-11-23 21:20:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:20:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2023-11-23 21:20:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:02,002 INFO L225 Difference]: With dead ends: 1062 [2023-11-23 21:20:02,002 INFO L226 Difference]: Without dead ends: 446 [2023-11-23 21:20:02,003 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 21:20:02,005 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:02,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 138 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:20:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-23 21:20:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 367. [2023-11-23 21:20:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 251 states have (on average 1.254980079681275) internal successors, (315), 277 states have internal predecessors, (315), 56 states have call successors, (56), 47 states have call predecessors, (56), 59 states have return successors, (72), 57 states have call predecessors, (72), 56 states have call successors, (72) [2023-11-23 21:20:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 443 transitions. [2023-11-23 21:20:02,062 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 443 transitions. Word has length 64 [2023-11-23 21:20:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:02,062 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 443 transitions. [2023-11-23 21:20:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 21:20:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 443 transitions. [2023-11-23 21:20:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:20:02,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:02,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:02,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:20:02,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:02,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash 821402790, now seen corresponding path program 1 times [2023-11-23 21:20:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:02,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580981354] [2023-11-23 21:20:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:02,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580981354] [2023-11-23 21:20:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580981354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527539174] [2023-11-23 21:20:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:02,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:02,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:02,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:02,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:20:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:02,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:20:02,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:02,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:20:03,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527539174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:03,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342279440] [2023-11-23 21:20:03,316 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-23 21:20:03,316 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:03,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:03,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:03,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:06,754 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 138 for LOIs [2023-11-23 21:20:06,875 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 19 for LOIs [2023-11-23 21:20:06,991 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 19 for LOIs [2023-11-23 21:20:07,038 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 19 for LOIs [2023-11-23 21:20:07,144 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 20 for LOIs [2023-11-23 21:20:07,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1342279440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:10,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:10,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [8, 11, 10] total 53 [2023-11-23 21:20:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970680137] [2023-11-23 21:20:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 21:20:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 21:20:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2421, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 21:20:10,412 INFO L87 Difference]: Start difference. First operand 367 states and 443 transitions. Second operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:20:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:19,158 INFO L93 Difference]: Finished difference Result 1187 states and 1591 transitions. [2023-11-23 21:20:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-23 21:20:19,159 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-11-23 21:20:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:19,166 INFO L225 Difference]: With dead ends: 1187 [2023-11-23 21:20:19,166 INFO L226 Difference]: Without dead ends: 887 [2023-11-23 21:20:19,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1378, Invalid=8722, Unknown=0, NotChecked=0, Total=10100 [2023-11-23 21:20:19,173 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 463 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:19,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 458 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-23 21:20:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-23 21:20:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 538. [2023-11-23 21:20:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 362 states have (on average 1.2541436464088398) internal successors, (454), 395 states have internal predecessors, (454), 87 states have call successors, (87), 76 states have call predecessors, (87), 88 states have return successors, (118), 83 states have call predecessors, (118), 87 states have call successors, (118) [2023-11-23 21:20:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 659 transitions. [2023-11-23 21:20:19,269 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 659 transitions. Word has length 61 [2023-11-23 21:20:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:19,270 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 659 transitions. [2023-11-23 21:20:19,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 25 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:20:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 659 transitions. [2023-11-23 21:20:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 21:20:19,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:19,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:19,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:19,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:19,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash 683161800, now seen corresponding path program 1 times [2023-11-23 21:20:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:19,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272862952] [2023-11-23 21:20:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:20:20,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272862952] [2023-11-23 21:20:20,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272862952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824070299] [2023-11-23 21:20:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:20,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:20:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:20,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:20:20,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:20,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:20:21,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824070299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:21,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144643000] [2023-11-23 21:20:21,117 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 21:20:21,117 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:21,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:21,118 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:21,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:23,812 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 21 for LOIs [2023-11-23 21:20:23,817 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 20 for LOIs [2023-11-23 21:20:24,115 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 21 for LOIs [2023-11-23 21:20:24,146 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 21 for LOIs [2023-11-23 21:20:24,217 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2023-11-23 21:20:24,225 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 16 for LOIs [2023-11-23 21:20:24,229 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 44 for LOIs [2023-11-23 21:20:24,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:27,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10289#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~methaneLevelCritical~0 2147483647) (= ~waterLevel~0 0))' at error location [2023-11-23 21:20:27,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:20:27,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 29 [2023-11-23 21:20:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439681370] [2023-11-23 21:20:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:20:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 21:20:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 21:20:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3749, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 21:20:27,881 INFO L87 Difference]: Start difference. First operand 538 states and 659 transitions. Second operand has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-23 21:20:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:37,783 INFO L93 Difference]: Finished difference Result 3884 states and 5683 transitions. [2023-11-23 21:20:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-11-23 21:20:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 63 [2023-11-23 21:20:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:37,812 INFO L225 Difference]: With dead ends: 3884 [2023-11-23 21:20:37,812 INFO L226 Difference]: Without dead ends: 3545 [2023-11-23 21:20:37,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21005 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=6389, Invalid=44913, Unknown=0, NotChecked=0, Total=51302 [2023-11-23 21:20:37,837 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1567 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:37,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 1638 Invalid, 4098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:20:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2023-11-23 21:20:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 2880. [2023-11-23 21:20:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2050 states have (on average 1.2775609756097561) internal successors, (2619), 2170 states have internal predecessors, (2619), 377 states have call successors, (377), 308 states have call predecessors, (377), 452 states have return successors, (940), 470 states have call predecessors, (940), 377 states have call successors, (940) [2023-11-23 21:20:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2023-11-23 21:20:38,303 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 63 [2023-11-23 21:20:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:38,304 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2023-11-23 21:20:38,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-23 21:20:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2023-11-23 21:20:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 21:20:38,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:38,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:38,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:20:38,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:38,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 160782990, now seen corresponding path program 1 times [2023-11-23 21:20:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973954571] [2023-11-23 21:20:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:39,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973954571] [2023-11-23 21:20:39,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973954571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915722958] [2023-11-23 21:20:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:39,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:39,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:39,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:20:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:39,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:20:39,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:20:39,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:39,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915722958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:39,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 22 [2023-11-23 21:20:39,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129736841] [2023-11-23 21:20:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:20:39,681 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:20:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:40,121 INFO L93 Difference]: Finished difference Result 4912 states and 7018 transitions. [2023-11-23 21:20:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2023-11-23 21:20:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:40,141 INFO L225 Difference]: With dead ends: 4912 [2023-11-23 21:20:40,142 INFO L226 Difference]: Without dead ends: 2231 [2023-11-23 21:20:40,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:20:40,158 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 38 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:40,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 167 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:20:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2023-11-23 21:20:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2039. [2023-11-23 21:20:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1433 states have (on average 1.21493370551291) internal successors, (1741), 1522 states have internal predecessors, (1741), 288 states have call successors, (288), 248 states have call predecessors, (288), 317 states have return successors, (571), 322 states have call predecessors, (571), 288 states have call successors, (571) [2023-11-23 21:20:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2600 transitions. [2023-11-23 21:20:40,489 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2600 transitions. Word has length 80 [2023-11-23 21:20:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 2039 states and 2600 transitions. [2023-11-23 21:20:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:20:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2600 transitions. [2023-11-23 21:20:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 21:20:40,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:40,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 21:20:40,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbbfa4-0118-45f4-97f1-80d38f9fa235/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:40,717 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:40,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -944864313, now seen corresponding path program 2 times [2023-11-23 21:20:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579787422] [2023-11-23 21:20:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat