./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34b47c00ac265c7154b048b065075686f0b0d02157935b615817b802464c404c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:47,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:47,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:29:47,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:47,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:47,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:47,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:47,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:47,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:47,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:47,808 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:47,809 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:47,809 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:47,810 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:47,810 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:47,811 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:47,812 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:47,812 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:47,813 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:47,813 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:47,814 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:47,814 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:47,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:47,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:47,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:29:47,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:47,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:29:47,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:47,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:47,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:47,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:47,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:29:47,819 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:47,820 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:47,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:47,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:47,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:47,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:47,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:47,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:47,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:47,822 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:47,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:47,822 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:47,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:47,823 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:47,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:47,823 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_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34b47c00ac265c7154b048b065075686f0b0d02157935b615817b802464c404c [2023-11-23 21:29:48,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:48,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:48,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:48,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:48,251 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:48,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c [2023-11-23 21:29:51,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:51,770 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:51,771 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c [2023-11-23 21:29:51,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/data/00dfb9acd/c03e70652d2d4d5f91b417c7eb9fd288/FLAGae19a4001 [2023-11-23 21:29:51,807 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/data/00dfb9acd/c03e70652d2d4d5f91b417c7eb9fd288 [2023-11-23 21:29:51,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:51,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:51,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:51,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:51,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:51,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:51" (1/1) ... [2023-11-23 21:29:51,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6c5053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:51, skipping insertion in model container [2023-11-23 21:29:51,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:51" (1/1) ... [2023-11-23 21:29:51,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:52,288 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_a5c9c34c-412e-41a9-b410-0f4653946921/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c[19180,19193] [2023-11-23 21:29:52,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:52,309 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:52,329 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [49] [2023-11-23 21:29:52,331 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [313] [2023-11-23 21:29:52,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [364] [2023-11-23 21:29:52,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [434] [2023-11-23 21:29:52,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [800] [2023-11-23 21:29:52,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [903] [2023-11-23 21:29:52,338 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1003] [2023-11-23 21:29:52,338 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1012] [2023-11-23 21:29:52,452 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_a5c9c34c-412e-41a9-b410-0f4653946921/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c[19180,19193] [2023-11-23 21:29:52,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:52,489 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:52,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52 WrapperNode [2023-11-23 21:29:52,490 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:52,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:52,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:52,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:52,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,554 INFO L138 Inliner]: procedures = 60, calls = 108, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 244 [2023-11-23 21:29:52,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:52,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:52,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:52,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:52,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:52,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:52,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:52,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:52,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:52,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:52,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:52,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:52,678 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:29:52,678 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:29:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:29:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:29:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:29:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:29:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:29:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:29:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:29:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:29:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:29:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:29:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-23 21:29:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-23 21:29:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-23 21:29:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-23 21:29:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:29:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:29:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:29:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:29:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:52,776 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:52,780 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:53,108 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:53,316 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:53,316 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:29:53,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:53 BoogieIcfgContainer [2023-11-23 21:29:53,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:53,322 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:53,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:53,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:53,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:51" (1/3) ... [2023-11-23 21:29:53,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138d4990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:53, skipping insertion in model container [2023-11-23 21:29:53,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (2/3) ... [2023-11-23 21:29:53,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138d4990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:53, skipping insertion in model container [2023-11-23 21:29:53,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:53" (3/3) ... [2023-11-23 21:29:53,330 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product62.cil.c [2023-11-23 21:29:53,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:53,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:53,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:53,428 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;@363b3703, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:53,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:29:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:29:53,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:53,445 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:53,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:53,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -184589084, now seen corresponding path program 1 times [2023-11-23 21:29:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029467737] [2023-11-23 21:29:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:53,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029467737] [2023-11-23 21:29:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029467737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:53,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:29:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949624467] [2023-11-23 21:29:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:29:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:29:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:29:53,808 INFO L87 Difference]: Start difference. First operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:29:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:53,978 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2023-11-23 21:29:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:29:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 21:29:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,001 INFO L225 Difference]: With dead ends: 148 [2023-11-23 21:29:54,010 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 21:29:54,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:29:54,020 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 21:29:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-23 21:29:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 51 states have internal predecessors, (55), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 21:29:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-11-23 21:29:54,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 21 [2023-11-23 21:29:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,095 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-11-23 21:29:54,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:29:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-11-23 21:29:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:29:54,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:29:54,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1035691065, now seen corresponding path program 1 times [2023-11-23 21:29:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470021999] [2023-11-23 21:29:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:54,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:54,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470021999] [2023-11-23 21:29:54,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470021999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:54,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:54,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:29:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143797549] [2023-11-23 21:29:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:54,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:54,342 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:29:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:54,637 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2023-11-23 21:29:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:29:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-23 21:29:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,641 INFO L225 Difference]: With dead ends: 188 [2023-11-23 21:29:54,642 INFO L226 Difference]: Without dead ends: 120 [2023-11-23 21:29:54,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:29:54,646 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 334 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-23 21:29:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2023-11-23 21:29:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 82 states have internal predecessors, (92), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (34), 22 states have call predecessors, (34), 24 states have call successors, (34) [2023-11-23 21:29:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2023-11-23 21:29:54,680 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 24 [2023-11-23 21:29:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2023-11-23 21:29:54,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:29:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2023-11-23 21:29:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:29:54,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,689 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:29:54,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1532594447, now seen corresponding path program 1 times [2023-11-23 21:29:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784646449] [2023-11-23 21:29:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:54,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:54,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784646449] [2023-11-23 21:29:54,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784646449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:54,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:54,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017434159] [2023-11-23 21:29:54,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:54,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:54,843 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:54,908 INFO L93 Difference]: Finished difference Result 192 states and 242 transitions. [2023-11-23 21:29:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:54,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-23 21:29:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,915 INFO L225 Difference]: With dead ends: 192 [2023-11-23 21:29:54,915 INFO L226 Difference]: Without dead ends: 102 [2023-11-23 21:29:54,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:54,926 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 119 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:29:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-23 21:29:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-23 21:29:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.25) internal successors, (80), 72 states have internal predecessors, (80), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (26), 18 states have call predecessors, (26), 20 states have call successors, (26) [2023-11-23 21:29:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2023-11-23 21:29:54,955 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 39 [2023-11-23 21:29:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,956 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2023-11-23 21:29:54,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2023-11-23 21:29:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 21:29:54,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:29:54,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1929395840, now seen corresponding path program 1 times [2023-11-23 21:29:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668942601] [2023-11-23 21:29:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:55,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:55,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668942601] [2023-11-23 21:29:55,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668942601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:55,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:29:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381946087] [2023-11-23 21:29:55,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:55,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:55,340 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:29:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:55,507 INFO L93 Difference]: Finished difference Result 289 states and 357 transitions. [2023-11-23 21:29:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:55,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2023-11-23 21:29:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:55,510 INFO L225 Difference]: With dead ends: 289 [2023-11-23 21:29:55,510 INFO L226 Difference]: Without dead ends: 189 [2023-11-23 21:29:55,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:55,512 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 119 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:55,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 200 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-23 21:29:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2023-11-23 21:29:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 129 states have internal predecessors, (142), 36 states have call successors, (36), 31 states have call predecessors, (36), 32 states have return successors, (48), 33 states have call predecessors, (48), 36 states have call successors, (48) [2023-11-23 21:29:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2023-11-23 21:29:55,542 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 41 [2023-11-23 21:29:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:55,543 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2023-11-23 21:29:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:29:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2023-11-23 21:29:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:29:55,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:55,546 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:55,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:29:55,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:55,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash 193665451, now seen corresponding path program 1 times [2023-11-23 21:29:55,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:55,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008353944] [2023-11-23 21:29:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:55,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008353944] [2023-11-23 21:29:55,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008353944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:55,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:55,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:29:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904703877] [2023-11-23 21:29:55,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:29:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:29:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:29:55,883 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:29:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:56,508 INFO L93 Difference]: Finished difference Result 428 states and 533 transitions. [2023-11-23 21:29:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:29:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2023-11-23 21:29:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:56,513 INFO L225 Difference]: With dead ends: 428 [2023-11-23 21:29:56,514 INFO L226 Difference]: Without dead ends: 298 [2023-11-23 21:29:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:29:56,516 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 231 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:56,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 229 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-23 21:29:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 275. [2023-11-23 21:29:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 177 states have (on average 1.231638418079096) internal successors, (218), 195 states have internal predecessors, (218), 51 states have call successors, (51), 39 states have call predecessors, (51), 46 states have return successors, (70), 52 states have call predecessors, (70), 51 states have call successors, (70) [2023-11-23 21:29:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2023-11-23 21:29:56,612 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 44 [2023-11-23 21:29:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:56,614 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2023-11-23 21:29:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:29:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2023-11-23 21:29:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:56,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:56,633 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:56,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:29:56,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:56,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash 652328349, now seen corresponding path program 1 times [2023-11-23 21:29:56,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760575641] [2023-11-23 21:29:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:56,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:29:56,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760575641] [2023-11-23 21:29:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760575641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:56,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:56,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:29:56,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146414070] [2023-11-23 21:29:56,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:56,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:29:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:29:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:29:56,849 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:29:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:57,453 INFO L93 Difference]: Finished difference Result 554 states and 709 transitions. [2023-11-23 21:29:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:29:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-23 21:29:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:57,459 INFO L225 Difference]: With dead ends: 554 [2023-11-23 21:29:57,459 INFO L226 Difference]: Without dead ends: 405 [2023-11-23 21:29:57,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:29:57,463 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 118 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:57,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 411 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-23 21:29:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 379. [2023-11-23 21:29:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 272 states have internal predecessors, (294), 70 states have call successors, (70), 54 states have call predecessors, (70), 64 states have return successors, (103), 70 states have call predecessors, (103), 70 states have call successors, (103) [2023-11-23 21:29:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 467 transitions. [2023-11-23 21:29:57,555 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 467 transitions. Word has length 61 [2023-11-23 21:29:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:57,557 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 467 transitions. [2023-11-23 21:29:57,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:29:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 467 transitions. [2023-11-23 21:29:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 21:29:57,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:57,562 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:57,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:29:57,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:57,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1545356138, now seen corresponding path program 1 times [2023-11-23 21:29:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824344045] [2023-11-23 21:29:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:57,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:29:57,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:57,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824344045] [2023-11-23 21:29:57,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824344045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715891659] [2023-11-23 21:29:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:57,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:57,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:57,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:29:57,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:58,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:29:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715891659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324578696] [2023-11-23 21:29:58,349 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2023-11-23 21:29:58,350 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:58,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:58,360 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:58,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:12,877 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 51 for LOIs [2023-11-23 21:30:12,893 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-11-23 21:30:13,164 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 39 for LOIs [2023-11-23 21:30:13,177 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 17 for LOIs [2023-11-23 21:30:13,217 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 17 for LOIs [2023-11-23 21:30:13,333 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 18 for LOIs [2023-11-23 21:30:13,337 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:18,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4651#(and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_42| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_42| 0) (= ~pumpRunning~0 1))) (= |old(~pumpRunning~0)| 0) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (= |old(~waterLevel~0)| ~waterLevel~0) (<= 2 |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ ~methaneLevelCritical~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|) (not (= 0 ~systemActive~0)) (= |old(~switchedOnBeforeTS~0)| 0))' at error location [2023-11-23 21:30:18,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:18,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:18,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-23 21:30:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064059724] [2023-11-23 21:30:18,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:30:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:30:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 21:30:18,978 INFO L87 Difference]: Start difference. First operand 379 states and 467 transitions. Second operand has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 21:30:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:22,182 INFO L93 Difference]: Finished difference Result 3189 states and 4285 transitions. [2023-11-23 21:30:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-23 21:30:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) Word has length 78 [2023-11-23 21:30:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:22,210 INFO L225 Difference]: With dead ends: 3189 [2023-11-23 21:30:22,210 INFO L226 Difference]: Without dead ends: 2750 [2023-11-23 21:30:22,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=796, Invalid=8710, Unknown=0, NotChecked=0, Total=9506 [2023-11-23 21:30:22,223 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 661 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:22,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1468 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:30:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2023-11-23 21:30:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2381. [2023-11-23 21:30:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 1558 states have (on average 1.1983311938382541) internal successors, (1867), 1701 states have internal predecessors, (1867), 430 states have call successors, (430), 364 states have call predecessors, (430), 392 states have return successors, (746), 409 states have call predecessors, (746), 430 states have call successors, (746) [2023-11-23 21:30:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 3043 transitions. [2023-11-23 21:30:22,524 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 3043 transitions. Word has length 78 [2023-11-23 21:30:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:22,527 INFO L495 AbstractCegarLoop]: Abstraction has 2381 states and 3043 transitions. [2023-11-23 21:30:22,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 21:30:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 3043 transitions. [2023-11-23 21:30:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 21:30:22,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:22,545 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:22,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:22,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:22,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -596415864, now seen corresponding path program 1 times [2023-11-23 21:30:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914359631] [2023-11-23 21:30:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-23 21:30:22,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:22,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914359631] [2023-11-23 21:30:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914359631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:22,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011154321] [2023-11-23 21:30:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:22,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:22,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:22,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5c9c34c-412e-41a9-b410-0f4653946921/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:30:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:23,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:30:23,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:30:23,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 53 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 21:30:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011154321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451124461] [2023-11-23 21:30:24,529 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-11-23 21:30:24,529 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:24,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:24,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:24,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:28,340 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 36 for LOIs [2023-11-23 21:30:28,349 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 33 for LOIs [2023-11-23 21:30:29,160 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 16 for LOIs [2023-11-23 21:30:29,162 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 22 for LOIs [2023-11-23 21:30:29,196 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 22 for LOIs [2023-11-23 21:30:29,279 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 59 for LOIs [2023-11-23 21:30:29,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:36,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13145#(and (<= |old(~waterLevel~0)| 2147483647) (<= 1 |#StackHeapBarrier|) (or (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_73| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_73| 0) (= ~pumpRunning~0 1))) (= |old(~waterLevel~0)| ~waterLevel~0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|)) (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= |old(~switchedOnBeforeTS~0)| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (<= 0 (+ |old(~switchedOnBeforeTS~0)| 2147483648)) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_73| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_73| 0) (= ~pumpRunning~0 1))) (= |old(~waterLevel~0)| ~waterLevel~0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|))) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (<= 2 ~waterLevel~0) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= ~head~0.base 0) (= ~switchedOnBeforeTS~0 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-23 21:30:36,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:36,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 25 [2023-11-23 21:30:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135255245] [2023-11-23 21:30:36,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:30:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:30:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3239, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 21:30:36,513 INFO L87 Difference]: Start difference. First operand 2381 states and 3043 transitions. Second operand has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 13 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (35), 14 states have call predecessors, (35), 12 states have call successors, (35)