./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 894b9126919d6af09c0902d1c20b8183acfd3589fe20590a119ca487cf6e7a3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:28,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:28,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:50:28,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:28,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:28,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:28,845 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:28,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:28,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:28,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:28,852 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:28,854 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:28,854 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:28,856 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:28,856 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:28,857 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:28,857 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:28,858 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:28,858 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:28,859 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:28,859 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:28,860 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:28,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:28,862 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:28,862 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:50:28,863 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:28,863 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:50:28,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:28,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:28,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:28,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:28,866 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:50:28,866 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:28,867 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:28,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:28,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:28,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:28,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:28,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:28,868 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:28,869 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:28,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:28,869 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:28,870 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:28,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:28,871 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_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894b9126919d6af09c0902d1c20b8183acfd3589fe20590a119ca487cf6e7a3f [2023-11-19 04:50:29,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:29,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:29,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:29,172 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:29,173 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:29,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c [2023-11-19 04:50:32,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:32,721 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:32,721 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c [2023-11-19 04:50:32,742 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/data/731af5ca5/a41533bfab51456597ab2332cf7dd9df/FLAGb94493f7b [2023-11-19 04:50:32,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/data/731af5ca5/a41533bfab51456597ab2332cf7dd9df [2023-11-19 04:50:32,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:32,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:32,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:32,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:32,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:32,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:32" (1/1) ... [2023-11-19 04:50:32,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb80cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:32, skipping insertion in model container [2023-11-19 04:50:32,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:32" (1/1) ... [2023-11-19 04:50:32,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:32,974 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_af3b38ed-571d-4750-a0d3-789b3faf2d76/sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c[1605,1618] [2023-11-19 04:50:33,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:33,128 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:33,138 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [49] [2023-11-19 04:50:33,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [58] [2023-11-19 04:50:33,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [130] [2023-11-19 04:50:33,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [388] [2023-11-19 04:50:33,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [415] [2023-11-19 04:50:33,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [453] [2023-11-19 04:50:33,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [549] [2023-11-19 04:50:33,142 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [915] [2023-11-19 04:50:33,149 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_af3b38ed-571d-4750-a0d3-789b3faf2d76/sv-benchmarks/c/product-lines/minepump_spec4_product62.cil.c[1605,1618] [2023-11-19 04:50:33,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:33,255 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:33,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33 WrapperNode [2023-11-19 04:50:33,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:33,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:33,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:33,258 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:33,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,314 INFO L138 Inliner]: procedures = 58, calls = 105, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 239 [2023-11-19 04:50:33,315 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:33,316 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:33,316 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:33,316 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:33,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:33,353 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:33,353 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:33,353 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:33,354 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (1/1) ... [2023-11-19 04:50:33,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:33,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:33,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:33,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:50:33,424 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:50:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:50:33,425 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:50:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:50:33,425 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:50:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:50:33,426 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:50:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:50:33,426 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:50:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:50:33,426 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:50:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 04:50:33,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 04:50:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 04:50:33,427 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 04:50:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:50:33,428 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:50:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:33,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:33,527 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:33,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:33,872 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:34,035 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:34,035 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:50:34,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:34 BoogieIcfgContainer [2023-11-19 04:50:34,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:34,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:34,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:34,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:34,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:32" (1/3) ... [2023-11-19 04:50:34,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a2803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:34, skipping insertion in model container [2023-11-19 04:50:34,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:33" (2/3) ... [2023-11-19 04:50:34,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a2803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:34, skipping insertion in model container [2023-11-19 04:50:34,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:34" (3/3) ... [2023-11-19 04:50:34,063 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product62.cil.c [2023-11-19 04:50:34,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:34,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:34,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:34,150 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;@fcc829a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:34,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 51 states have internal predecessors, (58), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 04:50:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:50:34,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:34,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:34,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1493556808, now seen corresponding path program 1 times [2023-11-19 04:50:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728781025] [2023-11-19 04:50:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:34,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:34,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728781025] [2023-11-19 04:50:34,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728781025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:34,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:34,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:50:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955838133] [2023-11-19 04:50:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:50:34,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:50:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:50:34,405 INFO L87 Difference]: Start difference. First operand has 68 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 51 states have internal predecessors, (58), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) 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) [2023-11-19 04:50:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:34,477 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2023-11-19 04:50:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:50:34,480 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 [2023-11-19 04:50:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:34,490 INFO L225 Difference]: With dead ends: 134 [2023-11-19 04:50:34,491 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 04:50:34,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:50:34,499 INFO L413 NwaCegarLoop]: 69 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, 69 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 [2023-11-19 04:50:34,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:50:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 04:50:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-19 04:50:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 47 states have internal predecessors, (50), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 04:50:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-11-19 04:50:34,558 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 12 [2023-11-19 04:50:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:34,559 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-11-19 04:50:34,559 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) [2023-11-19 04:50:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-11-19 04:50:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:50:34,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:34,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:34,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:34,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:34,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2007632148, now seen corresponding path program 1 times [2023-11-19 04:50:34,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:34,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181467485] [2023-11-19 04:50:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:34,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181467485] [2023-11-19 04:50:34,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181467485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:34,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209453944] [2023-11-19 04:50:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:34,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:34,746 INFO L87 Difference]: Start difference. First operand 63 states and 81 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) [2023-11-19 04:50:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:34,797 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2023-11-19 04:50:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:34,798 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 [2023-11-19 04:50:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:34,800 INFO L225 Difference]: With dead ends: 103 [2023-11-19 04:50:34,800 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 04:50:34,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:34,802 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 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 [2023-11-19 04:50:34,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:50:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 04:50:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-19 04:50:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 42 states have internal predecessors, (44), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 04:50:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-19 04:50:34,814 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 13 [2023-11-19 04:50:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:34,814 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-19 04:50:34,814 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) [2023-11-19 04:50:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-19 04:50:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:50:34,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:34,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:34,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -206380249, now seen corresponding path program 1 times [2023-11-19 04:50:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301110274] [2023-11-19 04:50:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:35,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:35,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301110274] [2023-11-19 04:50:35,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301110274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:35,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:35,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871490971] [2023-11-19 04:50:35,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:35,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:35,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:35,094 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-19 04:50:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:35,192 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2023-11-19 04:50:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2023-11-19 04:50:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:35,194 INFO L225 Difference]: With dead ends: 108 [2023-11-19 04:50:35,195 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 04:50:35,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:35,197 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 60 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:35,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 71 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 04:50:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-19 04:50:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 42 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 04:50:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-11-19 04:50:35,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 15 [2023-11-19 04:50:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:35,211 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-11-19 04:50:35,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-19 04:50:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-11-19 04:50:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:50:35,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:35,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:35,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:35,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2062005567, now seen corresponding path program 1 times [2023-11-19 04:50:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:35,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840570353] [2023-11-19 04:50:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:35,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:35,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840570353] [2023-11-19 04:50:35,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840570353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:35,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:35,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962878429] [2023-11-19 04:50:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:35,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:35,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:35,318 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:50:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:35,394 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2023-11-19 04:50:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-19 04:50:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:35,399 INFO L225 Difference]: With dead ends: 144 [2023-11-19 04:50:35,399 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 04:50:35,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:35,402 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:35,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 04:50:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-11-19 04:50:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 65 states have internal predecessors, (71), 16 states have call successors, (16), 15 states have call predecessors, (16), 15 states have return successors, (22), 14 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-19 04:50:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2023-11-19 04:50:35,440 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 25 [2023-11-19 04:50:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:35,441 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2023-11-19 04:50:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:50:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2023-11-19 04:50:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:50:35,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:35,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:35,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:50:35,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:35,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1501355126, now seen corresponding path program 1 times [2023-11-19 04:50:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:35,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896206961] [2023-11-19 04:50:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:35,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896206961] [2023-11-19 04:50:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896206961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:35,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:35,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:50:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324333082] [2023-11-19 04:50:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:50:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:50:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:50:35,635 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:50:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:35,806 INFO L93 Difference]: Finished difference Result 236 states and 289 transitions. [2023-11-19 04:50:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:50:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-19 04:50:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:35,813 INFO L225 Difference]: With dead ends: 236 [2023-11-19 04:50:35,813 INFO L226 Difference]: Without dead ends: 149 [2023-11-19 04:50:35,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:50:35,823 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 70 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:35,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 166 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-19 04:50:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2023-11-19 04:50:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 97 states have internal predecessors, (104), 22 states have call successors, (22), 21 states have call predecessors, (22), 24 states have return successors, (31), 22 states have call predecessors, (31), 22 states have call successors, (31) [2023-11-19 04:50:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2023-11-19 04:50:35,881 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 31 [2023-11-19 04:50:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:35,881 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2023-11-19 04:50:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:50:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2023-11-19 04:50:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:50:35,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:35,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:35,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:35,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1539827512, now seen corresponding path program 1 times [2023-11-19 04:50:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:35,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86862692] [2023-11-19 04:50:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:35,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:36,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86862692] [2023-11-19 04:50:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86862692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:50:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668697888] [2023-11-19 04:50:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:50:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:50:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:50:36,135 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:50:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:36,653 INFO L93 Difference]: Finished difference Result 322 states and 395 transitions. [2023-11-19 04:50:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:50:36,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-11-19 04:50:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:36,657 INFO L225 Difference]: With dead ends: 322 [2023-11-19 04:50:36,657 INFO L226 Difference]: Without dead ends: 235 [2023-11-19 04:50:36,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:50:36,659 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 160 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:36,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 252 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:50:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-19 04:50:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 216. [2023-11-19 04:50:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 141 states have (on average 1.198581560283688) internal successors, (169), 158 states have internal predecessors, (169), 36 states have call successors, (36), 31 states have call predecessors, (36), 38 states have return successors, (51), 37 states have call predecessors, (51), 36 states have call successors, (51) [2023-11-19 04:50:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2023-11-19 04:50:36,720 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 34 [2023-11-19 04:50:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:36,721 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2023-11-19 04:50:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:50:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2023-11-19 04:50:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:50:36,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:36,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:36,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:50:36,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:36,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -905383714, now seen corresponding path program 1 times [2023-11-19 04:50:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296657723] [2023-11-19 04:50:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:50:37,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296657723] [2023-11-19 04:50:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296657723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:37,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:37,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 04:50:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918789159] [2023-11-19 04:50:37,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:37,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:50:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:50:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:50:37,130 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:50:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:37,578 INFO L93 Difference]: Finished difference Result 355 states and 433 transitions. [2023-11-19 04:50:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:50:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2023-11-19 04:50:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:37,584 INFO L225 Difference]: With dead ends: 355 [2023-11-19 04:50:37,585 INFO L226 Difference]: Without dead ends: 255 [2023-11-19 04:50:37,585 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 [2023-11-19 04:50:37,587 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 129 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:37,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 150 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:50:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-19 04:50:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2023-11-19 04:50:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 157 states have internal predecessors, (170), 35 states have call successors, (35), 30 states have call predecessors, (35), 38 states have return successors, (53), 37 states have call predecessors, (53), 35 states have call successors, (53) [2023-11-19 04:50:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 258 transitions. [2023-11-19 04:50:37,641 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 258 transitions. Word has length 55 [2023-11-19 04:50:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:37,643 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 258 transitions. [2023-11-19 04:50:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:50:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 258 transitions. [2023-11-19 04:50:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:50:37,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:37,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:50:37,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:37,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1765209460, now seen corresponding path program 1 times [2023-11-19 04:50:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:37,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508005733] [2023-11-19 04:50:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:50:37,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:37,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508005733] [2023-11-19 04:50:37,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508005733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:37,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:37,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:50:37,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218886434] [2023-11-19 04:50:37,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:50:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:50:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:50:37,810 INFO L87 Difference]: Start difference. First operand 215 states and 258 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-19 04:50:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:38,018 INFO L93 Difference]: Finished difference Result 535 states and 650 transitions. [2023-11-19 04:50:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:50:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 58 [2023-11-19 04:50:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:38,022 INFO L225 Difference]: With dead ends: 535 [2023-11-19 04:50:38,022 INFO L226 Difference]: Without dead ends: 429 [2023-11-19 04:50:38,023 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 [2023-11-19 04:50:38,024 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 47 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:38,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 243 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-11-19 04:50:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 409. [2023-11-19 04:50:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 274 states have (on average 1.2043795620437956) internal successors, (330), 298 states have internal predecessors, (330), 63 states have call successors, (63), 55 states have call predecessors, (63), 71 states have return successors, (99), 69 states have call predecessors, (99), 63 states have call successors, (99) [2023-11-19 04:50:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 492 transitions. [2023-11-19 04:50:38,098 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 492 transitions. Word has length 58 [2023-11-19 04:50:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:38,098 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 492 transitions. [2023-11-19 04:50:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-19 04:50:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 492 transitions. [2023-11-19 04:50:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:50:38,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:38,104 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:50:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:50:38,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:38,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:38,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1170562570, now seen corresponding path program 1 times [2023-11-19 04:50:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636967413] [2023-11-19 04:50:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:50:38,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636967413] [2023-11-19 04:50:38,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636967413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350154840] [2023-11-19 04:50:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:38,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:38,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:50:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:38,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 04:50:38,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:39,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:50:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:50:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350154840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:50:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55706998] [2023-11-19 04:50:39,686 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-19 04:50:39,686 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:50:39,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:50:39,697 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:50:39,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:50:42,869 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 17 for LOIs [2023-11-19 04:50:42,876 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 30 for LOIs [2023-11-19 04:50:43,534 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-11-19 04:50:43,640 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:50:43,846 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 35 for LOIs [2023-11-19 04:50:43,880 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 32 for LOIs [2023-11-19 04:50:43,895 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 52 for LOIs [2023-11-19 04:50:43,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:50:47,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4808#(and (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (<= ~methaneLevelCritical~0 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-11-19 04:50:47,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:50:47,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:50:47,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-11-19 04:50:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675450564] [2023-11-19 04:50:47,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:50:47,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 04:50:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 04:50:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3137, Unknown=0, NotChecked=0, Total=3540 [2023-11-19 04:50:47,792 INFO L87 Difference]: Start difference. First operand 409 states and 492 transitions. Second operand has 23 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-19 04:50:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:49,813 INFO L93 Difference]: Finished difference Result 1154 states and 1449 transitions. [2023-11-19 04:50:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-19 04:50:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) Word has length 61 [2023-11-19 04:50:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:49,821 INFO L225 Difference]: With dead ends: 1154 [2023-11-19 04:50:49,821 INFO L226 Difference]: Without dead ends: 953 [2023-11-19 04:50:49,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1409, Invalid=8691, Unknown=0, NotChecked=0, Total=10100 [2023-11-19 04:50:49,828 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 728 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:49,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 324 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:50:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-11-19 04:50:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 892. [2023-11-19 04:50:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 605 states have (on average 1.1619834710743802) internal successors, (703), 656 states have internal predecessors, (703), 130 states have call successors, (130), 108 states have call predecessors, (130), 156 states have return successors, (232), 156 states have call predecessors, (232), 130 states have call successors, (232) [2023-11-19 04:50:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1065 transitions. [2023-11-19 04:50:49,920 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1065 transitions. Word has length 61 [2023-11-19 04:50:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:49,921 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1065 transitions. [2023-11-19 04:50:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-19 04:50:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1065 transitions. [2023-11-19 04:50:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 04:50:49,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:49,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:49,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:50:50,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:50,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:50,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 421494591, now seen corresponding path program 1 times [2023-11-19 04:50:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785428339] [2023-11-19 04:50:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:50:50,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785428339] [2023-11-19 04:50:50,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785428339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:50,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880944143] [2023-11-19 04:50:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:50,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:50,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:50:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:50,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:50:50,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:50:51,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:50:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:50:51,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880944143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:50:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437827907] [2023-11-19 04:50:51,915 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-11-19 04:50:51,915 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:50:51,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:50:51,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:50:51,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:50:54,338 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 17 for LOIs [2023-11-19 04:50:54,343 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 30 for LOIs [2023-11-19 04:50:54,816 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-11-19 04:50:54,969 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:50:55,132 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 35 for LOIs [2023-11-19 04:50:55,151 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 32 for LOIs [2023-11-19 04:50:55,157 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 30 for LOIs [2023-11-19 04:50:55,162 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 52 for LOIs [2023-11-19 04:50:55,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:50:59,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8155#(and (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-11-19 04:50:59,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:50:59,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:50:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 31 [2023-11-19 04:50:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803603725] [2023-11-19 04:50:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:50:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-19 04:50:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-19 04:50:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=4135, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 04:50:59,173 INFO L87 Difference]: Start difference. First operand 892 states and 1065 transitions. Second operand has 31 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 states have internal predecessors, (124), 14 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2023-11-19 04:51:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:02,385 INFO L93 Difference]: Finished difference Result 2955 states and 3751 transitions. [2023-11-19 04:51:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-19 04:51:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 states have internal predecessors, (124), 14 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) Word has length 90 [2023-11-19 04:51:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:02,402 INFO L225 Difference]: With dead ends: 2955 [2023-11-19 04:51:02,403 INFO L226 Difference]: Without dead ends: 2462 [2023-11-19 04:51:02,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 219 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8005 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2538, Invalid=14492, Unknown=0, NotChecked=0, Total=17030 [2023-11-19 04:51:02,412 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1318 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 955 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 955 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:02,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 389 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [955 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:51:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2023-11-19 04:51:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1836. [2023-11-19 04:51:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1257 states have (on average 1.1638822593476532) internal successors, (1463), 1348 states have internal predecessors, (1463), 256 states have call successors, (256), 216 states have call predecessors, (256), 322 states have return successors, (510), 322 states have call predecessors, (510), 256 states have call successors, (510) [2023-11-19 04:51:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2229 transitions. [2023-11-19 04:51:02,614 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2229 transitions. Word has length 90 [2023-11-19 04:51:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:02,615 INFO L495 AbstractCegarLoop]: Abstraction has 1836 states and 2229 transitions. [2023-11-19 04:51:02,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 states have internal predecessors, (124), 14 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2023-11-19 04:51:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2229 transitions. [2023-11-19 04:51:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 04:51:02,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:02,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:02,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:51:02,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:02,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1604821867, now seen corresponding path program 1 times [2023-11-19 04:51:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453662493] [2023-11-19 04:51:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:51:03,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453662493] [2023-11-19 04:51:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453662493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004955203] [2023-11-19 04:51:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:03,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:03,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:03,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:51:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:03,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:51:03,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:51:03,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:03,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004955203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:03,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:03,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2023-11-19 04:51:03,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992311154] [2023-11-19 04:51:03,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:03,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:51:03,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:51:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:51:03,664 INFO L87 Difference]: Start difference. First operand 1836 states and 2229 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 04:51:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:03,919 INFO L93 Difference]: Finished difference Result 1852 states and 2244 transitions. [2023-11-19 04:51:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:51:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 95 [2023-11-19 04:51:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:03,933 INFO L225 Difference]: With dead ends: 1852 [2023-11-19 04:51:03,934 INFO L226 Difference]: Without dead ends: 1850 [2023-11-19 04:51:03,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:51:03,936 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:03,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 143 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:51:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2023-11-19 04:51:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1836. [2023-11-19 04:51:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1257 states have (on average 1.1591089896579156) internal successors, (1457), 1348 states have internal predecessors, (1457), 256 states have call successors, (256), 216 states have call predecessors, (256), 322 states have return successors, (510), 322 states have call predecessors, (510), 256 states have call successors, (510) [2023-11-19 04:51:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2223 transitions. [2023-11-19 04:51:04,159 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2223 transitions. Word has length 95 [2023-11-19 04:51:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:04,160 INFO L495 AbstractCegarLoop]: Abstraction has 1836 states and 2223 transitions. [2023-11-19 04:51:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 04:51:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2223 transitions. [2023-11-19 04:51:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 04:51:04,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:04,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:04,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:04,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:04,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 857044508, now seen corresponding path program 1 times [2023-11-19 04:51:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:04,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301838578] [2023-11-19 04:51:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:04,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 04:51:05,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:05,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301838578] [2023-11-19 04:51:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301838578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:05,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265437966] [2023-11-19 04:51:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:05,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:05,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:05,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3b38ed-571d-4750-a0d3-789b3faf2d76/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:51:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:05,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 04:51:05,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:51:05,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-19 04:51:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265437966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195779041] [2023-11-19 04:51:06,246 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-19 04:51:06,246 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:06,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:06,248 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:06,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:51:12,798 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 10 for LOIs [2023-11-19 04:51:12,802 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 7 for LOIs [2023-11-19 04:51:12,899 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 9 for LOIs [2023-11-19 04:51:12,943 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 17 for LOIs [2023-11-19 04:51:13,035 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 13 for LOIs [2023-11-19 04:51:13,039 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 9 for LOIs [2023-11-19 04:51:13,040 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:51:16,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20177#(and (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= |timeShift_getWaterLevel_#res#1| 0) (or (= ~methaneLevelCritical~0 0) (= |old(~pumpRunning~0)| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-11-19 04:51:16,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:51:16,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:51:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 33 [2023-11-19 04:51:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34564725] [2023-11-19 04:51:16,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:51:16,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 04:51:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 04:51:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=4468, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 04:51:16,792 INFO L87 Difference]: Start difference. First operand 1836 states and 2223 transitions. Second operand has 33 states, 30 states have (on average 4.5) internal successors, (135), 30 states have internal predecessors, (135), 17 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32)