./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/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_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/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_ff11e2d4-db63-4315-9b2f-99b22156a5e1/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 7573d0f26b9c64760f56bc1038037f99fa78fd69add5234955c16ce4082df45a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:31:26,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:31:26,528 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:31:26,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:31:26,536 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:31:26,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:31:26,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:31:26,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:31:26,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:31:26,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:31:26,569 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:31:26,569 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:31:26,570 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:31:26,571 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:31:26,571 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:31:26,572 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:31:26,573 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:31:26,574 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:31:26,574 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:31:26,575 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:31:26,576 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:31:26,576 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:31:26,577 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:31:26,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:31:26,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:31:26,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:31:26,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:31:26,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:31:26,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:31:26,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:31:26,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:31:26,582 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:31:26,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:31:26,583 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:31:26,583 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:31:26,583 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:31:26,584 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:31:26,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:26,584 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:31:26,585 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:31:26,585 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:31:26,585 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:31:26,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:31:26,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:31:26,586 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:31:26,587 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:31:26,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:31:26,587 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_ff11e2d4-db63-4315-9b2f-99b22156a5e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7573d0f26b9c64760f56bc1038037f99fa78fd69add5234955c16ce4082df45a [2023-11-23 20:31:26,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:31:26,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:31:26,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:31:26,929 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:31:26,930 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:31:26,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2023-11-23 20:31:30,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:31:30,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:31:30,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c [2023-11-23 20:31:30,555 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/data/1c2d47729/f824c9e53ea94a9b86852f73848dc564/FLAGbfdf45af7 [2023-11-23 20:31:30,570 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/data/1c2d47729/f824c9e53ea94a9b86852f73848dc564 [2023-11-23 20:31:30,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:31:30,575 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:31:30,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:30,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:31:30,582 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:31:30,583 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:30" (1/1) ... [2023-11-23 20:31:30,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6639e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:30, skipping insertion in model container [2023-11-23 20:31:30,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:30" (1/1) ... [2023-11-23 20:31:30,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:31:30,933 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_ff11e2d4-db63-4315-9b2f-99b22156a5e1/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2023-11-23 20:31:30,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:30,965 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:31:30,976 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [49] [2023-11-23 20:31:30,978 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [118] [2023-11-23 20:31:30,978 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [343] [2023-11-23 20:31:30,979 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [371] [2023-11-23 20:31:30,979 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [474] [2023-11-23 20:31:30,979 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [512] [2023-11-23 20:31:30,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [608] [2023-11-23 20:31:30,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [974] [2023-11-23 20:31:31,112 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_ff11e2d4-db63-4315-9b2f-99b22156a5e1/sv-benchmarks/c/product-lines/minepump_spec4_product57.cil.c[18691,18704] [2023-11-23 20:31:31,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:31,136 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:31:31,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31 WrapperNode [2023-11-23 20:31:31,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:31,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:31,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:31:31,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:31:31,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,204 INFO L138 Inliner]: procedures = 56, calls = 100, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 227 [2023-11-23 20:31:31,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:31,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:31:31,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:31:31,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:31:31,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:31:31,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:31:31,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:31:31,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:31:31,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (1/1) ... [2023-11-23 20:31:31,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:31,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:31:31,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:31:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:31:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 20:31:31,321 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 20:31:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:31:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:31:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:31:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:31:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:31:31,322 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:31:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 20:31:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 20:31:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:31:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 20:31:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 20:31:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:31:31,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:31:31,405 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:31:31,407 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:31:31,745 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:31:31,953 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:31:31,960 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:31:31,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:31 BoogieIcfgContainer [2023-11-23 20:31:31,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:31:31,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:31:31,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:31:31,988 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:31:31,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:30" (1/3) ... [2023-11-23 20:31:31,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650843d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:31, skipping insertion in model container [2023-11-23 20:31:31,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:31" (2/3) ... [2023-11-23 20:31:31,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650843d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:31, skipping insertion in model container [2023-11-23 20:31:31,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:31" (3/3) ... [2023-11-23 20:31:31,991 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product57.cil.c [2023-11-23 20:31:32,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:31:32,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:31:32,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:31:32,087 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;@195d521d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:31:32,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:31:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 20:31:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:31:32,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:32,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:32,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:32,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash 925135416, now seen corresponding path program 1 times [2023-11-23 20:31:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:32,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432490301] [2023-11-23 20:31:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:32,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432490301] [2023-11-23 20:31:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432490301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:32,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:32,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:32,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755670880] [2023-11-23 20:31:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:31:32,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:31:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:31:32,462 INFO L87 Difference]: Start difference. First operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:32,554 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2023-11-23 20:31:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:31:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 20:31:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:32,570 INFO L225 Difference]: With dead ends: 100 [2023-11-23 20:31:32,571 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 20:31:32,576 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 20:31:32,579 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:32,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:31:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 20:31:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-23 20:31:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 37 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 20:31:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2023-11-23 20:31:32,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 12 [2023-11-23 20:31:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:32,633 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2023-11-23 20:31:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2023-11-23 20:31:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:31:32,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:32,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:31:32,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:32,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash -645930301, now seen corresponding path program 1 times [2023-11-23 20:31:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:32,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739951702] [2023-11-23 20:31:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:32,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:32,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739951702] [2023-11-23 20:31:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739951702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:32,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550989510] [2023-11-23 20:31:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:32,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:32,748 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:32,801 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2023-11-23 20:31:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 20:31:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:32,804 INFO L225 Difference]: With dead ends: 69 [2023-11-23 20:31:32,805 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 20:31:32,806 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 20:31:32,808 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:32,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 59 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:31:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 20:31:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 20:31:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:31:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-23 20:31:32,820 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 13 [2023-11-23 20:31:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-23 20:31:32,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-23 20:31:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:31:32,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:32,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:31:32,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:32,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -520931279, now seen corresponding path program 1 times [2023-11-23 20:31:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:32,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378338474] [2023-11-23 20:31:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:33,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:33,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378338474] [2023-11-23 20:31:33,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378338474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:33,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:33,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065043617] [2023-11-23 20:31:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:33,074 INFO L87 Difference]: Start difference. First operand 38 states and 48 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) [2023-11-23 20:31:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:33,259 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-11-23 20:31:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:33,260 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 [2023-11-23 20:31:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:33,262 INFO L225 Difference]: With dead ends: 74 [2023-11-23 20:31:33,262 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 20:31:33,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:33,270 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:33,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 20:31:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 20:31:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.32) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:31:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-23 20:31:33,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 15 [2023-11-23 20:31:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:33,289 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-23 20:31:33,290 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) [2023-11-23 20:31:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-23 20:31:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:31:33,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:33,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:33,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:31:33,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:33,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -239113171, now seen corresponding path program 1 times [2023-11-23 20:31:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:33,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217114895] [2023-11-23 20:31:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:33,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:33,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217114895] [2023-11-23 20:31:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217114895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:33,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:33,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:33,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926400378] [2023-11-23 20:31:33,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:33,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:33,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:33,395 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:33,536 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2023-11-23 20:31:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2023-11-23 20:31:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:33,541 INFO L225 Difference]: With dead ends: 104 [2023-11-23 20:31:33,541 INFO L226 Difference]: Without dead ends: 68 [2023-11-23 20:31:33,546 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 20:31:33,551 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-23 20:31:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-11-23 20:31:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-23 20:31:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2023-11-23 20:31:33,579 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 18 [2023-11-23 20:31:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:33,580 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2023-11-23 20:31:33,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:31:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2023-11-23 20:31:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:31:33,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:33,582 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] [2023-11-23 20:31:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:31:33,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:33,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -504825396, now seen corresponding path program 1 times [2023-11-23 20:31:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:33,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511424155] [2023-11-23 20:31:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:33,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:33,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:33,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511424155] [2023-11-23 20:31:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511424155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:33,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:33,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:31:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763339082] [2023-11-23 20:31:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:31:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:31:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:33,858 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:31:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:34,028 INFO L93 Difference]: Finished difference Result 179 states and 222 transitions. [2023-11-23 20:31:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:31:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-23 20:31:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:34,036 INFO L225 Difference]: With dead ends: 179 [2023-11-23 20:31:34,037 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 20:31:34,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:31:34,039 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 110 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 20:31:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2023-11-23 20:31:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 78 states have internal predecessors, (84), 14 states have call successors, (14), 14 states have call predecessors, (14), 16 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2023-11-23 20:31:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2023-11-23 20:31:34,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 23 [2023-11-23 20:31:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:34,095 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2023-11-23 20:31:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:31:34,096 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2023-11-23 20:31:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 20:31:34,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:34,103 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] [2023-11-23 20:31:34,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:31:34,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:34,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash -320678427, now seen corresponding path program 1 times [2023-11-23 20:31:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167800033] [2023-11-23 20:31:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:34,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167800033] [2023-11-23 20:31:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167800033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:34,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:34,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:31:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968610217] [2023-11-23 20:31:34,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:34,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:31:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:31:34,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:31:34,515 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:31:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:35,095 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2023-11-23 20:31:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:31:35,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-23 20:31:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:35,098 INFO L225 Difference]: With dead ends: 251 [2023-11-23 20:31:35,098 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 20:31:35,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:31:35,100 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 111 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:35,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 236 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:31:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 20:31:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2023-11-23 20:31:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 132 states have internal predecessors, (142), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (35), 26 states have call predecessors, (35), 24 states have call successors, (35) [2023-11-23 20:31:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2023-11-23 20:31:35,145 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 26 [2023-11-23 20:31:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:35,146 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2023-11-23 20:31:35,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:31:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2023-11-23 20:31:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:31:35,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:35,149 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] [2023-11-23 20:31:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:31:35,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:35,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1808926735, now seen corresponding path program 1 times [2023-11-23 20:31:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848496112] [2023-11-23 20:31:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:35,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:35,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848496112] [2023-11-23 20:31:35,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848496112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:35,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:35,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:31:35,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312102333] [2023-11-23 20:31:35,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:35,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:31:35,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:35,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:31:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:31:35,594 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:31:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:35,942 INFO L93 Difference]: Finished difference Result 280 states and 345 transitions. [2023-11-23 20:31:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:31:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-11-23 20:31:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:35,949 INFO L225 Difference]: With dead ends: 280 [2023-11-23 20:31:35,949 INFO L226 Difference]: Without dead ends: 209 [2023-11-23 20:31:35,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:31:35,953 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:35,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 107 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:31:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-23 20:31:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2023-11-23 20:31:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 132 states have internal predecessors, (144), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) [2023-11-23 20:31:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2023-11-23 20:31:36,020 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 39 [2023-11-23 20:31:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2023-11-23 20:31:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:31:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2023-11-23 20:31:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 20:31:36,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:36,023 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] [2023-11-23 20:31:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:31:36,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1753645578, now seen corresponding path program 1 times [2023-11-23 20:31:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:36,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114565480] [2023-11-23 20:31:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:31:36,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:36,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114565480] [2023-11-23 20:31:36,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114565480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:36,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:36,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:31:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260842755] [2023-11-23 20:31:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:36,109 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:31:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:36,197 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2023-11-23 20:31:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:31:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-11-23 20:31:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:36,203 INFO L225 Difference]: With dead ends: 176 [2023-11-23 20:31:36,203 INFO L226 Difference]: Without dead ends: 174 [2023-11-23 20:31:36,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:36,205 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:36,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:31:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-23 20:31:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2023-11-23 20:31:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 132 states have internal predecessors, (142), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (36), 26 states have call predecessors, (36), 24 states have call successors, (36) [2023-11-23 20:31:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2023-11-23 20:31:36,231 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 42 [2023-11-23 20:31:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:36,231 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2023-11-23 20:31:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:31:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2023-11-23 20:31:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:31:36,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:36,233 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:31:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:31:36,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:36,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash -563739121, now seen corresponding path program 1 times [2023-11-23 20:31:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608349844] [2023-11-23 20:31:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:31:36,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608349844] [2023-11-23 20:31:36,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608349844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406288390] [2023-11-23 20:31:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:36,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:36,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:31:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:36,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 20:31:36,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:37,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:31:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:31:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406288390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:31:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093463036] [2023-11-23 20:31:37,839 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 20:31:37,840 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:31:37,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:31:37,851 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:31:37,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:31:43,627 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 146 for LOIs [2023-11-23 20:31:43,732 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 25 for LOIs [2023-11-23 20:31:43,985 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 25 for LOIs [2023-11-23 20:31:44,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:31:48,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1093463036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:48,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:31:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [11, 11, 10] total 47 [2023-11-23 20:31:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867748664] [2023-11-23 20:31:48,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 20:31:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 20:31:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2023-11-23 20:31:48,294 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:31:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:56,527 INFO L93 Difference]: Finished difference Result 462 states and 595 transitions. [2023-11-23 20:31:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 20:31:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-11-23 20:31:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:56,532 INFO L225 Difference]: With dead ends: 462 [2023-11-23 20:31:56,532 INFO L226 Difference]: Without dead ends: 387 [2023-11-23 20:31:56,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=822, Invalid=3870, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 20:31:56,535 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:56,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 237 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 20:31:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-23 20:31:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 291. [2023-11-23 20:31:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 204 states have (on average 1.2254901960784315) internal successors, (250), 227 states have internal predecessors, (250), 40 states have call successors, (40), 33 states have call predecessors, (40), 46 states have return successors, (76), 46 states have call predecessors, (76), 40 states have call successors, (76) [2023-11-23 20:31:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2023-11-23 20:31:56,605 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 47 [2023-11-23 20:31:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:56,606 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2023-11-23 20:31:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:31:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2023-11-23 20:31:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 20:31:56,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:56,608 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:31:56,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:31:56,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:56,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:56,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash 410196020, now seen corresponding path program 1 times [2023-11-23 20:31:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:56,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102946376] [2023-11-23 20:31:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:31:56,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102946376] [2023-11-23 20:31:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102946376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:56,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:56,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:31:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961189476] [2023-11-23 20:31:56,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:31:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:31:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:56,939 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:31:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:57,105 INFO L93 Difference]: Finished difference Result 480 states and 619 transitions. [2023-11-23 20:31:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:31:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-23 20:31:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:57,109 INFO L225 Difference]: With dead ends: 480 [2023-11-23 20:31:57,110 INFO L226 Difference]: Without dead ends: 299 [2023-11-23 20:31:57,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:31:57,111 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 72 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:57,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 111 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-23 20:31:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2023-11-23 20:31:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 207 states have (on average 1.2028985507246377) internal successors, (249), 230 states have internal predecessors, (249), 44 states have call successors, (44), 37 states have call predecessors, (44), 45 states have return successors, (69), 46 states have call predecessors, (69), 44 states have call successors, (69) [2023-11-23 20:31:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 362 transitions. [2023-11-23 20:31:57,179 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 362 transitions. Word has length 51 [2023-11-23 20:31:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:57,179 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 362 transitions. [2023-11-23 20:31:57,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:31:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 362 transitions. [2023-11-23 20:31:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:31:57,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:57,181 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] [2023-11-23 20:31:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:31:57,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:57,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1895388047, now seen corresponding path program 1 times [2023-11-23 20:31:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133418637] [2023-11-23 20:31:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:57,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133418637] [2023-11-23 20:31:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133418637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453509566] [2023-11-23 20:31:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:57,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:57,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:57,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:31:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:57,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:31:57,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:57,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:31:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:31:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453509566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:31:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893580858] [2023-11-23 20:31:58,228 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-23 20:31:58,228 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:31:58,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:31:58,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:31:58,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:32:00,271 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 17 for LOIs [2023-11-23 20:32:00,275 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2023-11-23 20:32:00,426 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 37 for LOIs [2023-11-23 20:32:00,531 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 32 for LOIs [2023-11-23 20:32:00,540 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 28 for LOIs [2023-11-23 20:32:00,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:32:02,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5504#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-23 20:32:02,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:32:02,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:32:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-11-23 20:32:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551328741] [2023-11-23 20:32:02,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:32:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 20:32:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 20:32:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 20:32:02,375 INFO L87 Difference]: Start difference. First operand 297 states and 362 transitions. Second operand has 23 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-23 20:32:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:03,899 INFO L93 Difference]: Finished difference Result 710 states and 887 transitions. [2023-11-23 20:32:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 20:32:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) Word has length 53 [2023-11-23 20:32:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:03,904 INFO L225 Difference]: With dead ends: 710 [2023-11-23 20:32:03,904 INFO L226 Difference]: Without dead ends: 514 [2023-11-23 20:32:03,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 122 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1152, Invalid=6504, Unknown=0, NotChecked=0, Total=7656 [2023-11-23 20:32:03,909 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 434 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:03,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 321 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:32:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-11-23 20:32:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 398. [2023-11-23 20:32:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 274 states have (on average 1.1715328467153285) internal successors, (321), 304 states have internal predecessors, (321), 59 states have call successors, (59), 53 states have call predecessors, (59), 64 states have return successors, (85), 63 states have call predecessors, (85), 59 states have call successors, (85) [2023-11-23 20:32:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 465 transitions. [2023-11-23 20:32:03,980 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 465 transitions. Word has length 53 [2023-11-23 20:32:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:03,981 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 465 transitions. [2023-11-23 20:32:03,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-23 20:32:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 465 transitions. [2023-11-23 20:32:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:32:03,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:03,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:04,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:04,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 20:32:04,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:04,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1633276682, now seen corresponding path program 2 times [2023-11-23 20:32:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376677559] [2023-11-23 20:32:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:04,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376677559] [2023-11-23 20:32:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376677559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676378008] [2023-11-23 20:32:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:32:04,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:04,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:04,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:32:04,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 20:32:04,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:32:04,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:32:04,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 20:32:04,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:04,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676378008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:04,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:04,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 18 [2023-11-23 20:32:04,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548798933] [2023-11-23 20:32:04,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:04,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:04,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:32:04,972 INFO L87 Difference]: Start difference. First operand 398 states and 465 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:32:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:05,119 INFO L93 Difference]: Finished difference Result 623 states and 737 transitions. [2023-11-23 20:32:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:32:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-11-23 20:32:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:05,123 INFO L225 Difference]: With dead ends: 623 [2023-11-23 20:32:05,123 INFO L226 Difference]: Without dead ends: 397 [2023-11-23 20:32:05,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-23 20:32:05,125 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:05,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-23 20:32:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2023-11-23 20:32:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 273 states have (on average 1.164835164835165) internal successors, (318), 303 states have internal predecessors, (318), 59 states have call successors, (59), 53 states have call predecessors, (59), 64 states have return successors, (85), 63 states have call predecessors, (85), 59 states have call successors, (85) [2023-11-23 20:32:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 462 transitions. [2023-11-23 20:32:05,216 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 462 transitions. Word has length 63 [2023-11-23 20:32:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:05,217 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 462 transitions. [2023-11-23 20:32:05,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:32:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 462 transitions. [2023-11-23 20:32:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 20:32:05,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:05,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:05,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 20:32:05,433 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:05,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2026733899, now seen corresponding path program 1 times [2023-11-23 20:32:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535289474] [2023-11-23 20:32:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:05,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:32:05,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535289474] [2023-11-23 20:32:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535289474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590501347] [2023-11-23 20:32:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:05,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:05,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:05,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:32:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:06,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:32:06,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 43 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:32:06,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:32:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 20:32:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590501347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:32:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422512994] [2023-11-23 20:32:06,804 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-23 20:32:06,804 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:32:06,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:32:06,805 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:32:06,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:32:09,403 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 141 for LOIs [2023-11-23 20:32:09,480 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2023-11-23 20:32:09,604 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 34 for LOIs [2023-11-23 20:32:09,675 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 26 for LOIs [2023-11-23 20:32:09,678 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:32:13,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9091#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (or (and (= |timeShift_isLowWaterLevel_#res#1| 0) (= |timeShift_isLowWaterSensorDry_#res#1| 1)) (= |old(~pumpRunning~0)| 0)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-23 20:32:13,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:32:13,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:32:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2023-11-23 20:32:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195401104] [2023-11-23 20:32:13,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:32:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 20:32:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 20:32:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 20:32:13,071 INFO L87 Difference]: Start difference. First operand 397 states and 462 transitions. Second operand has 28 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-23 20:32:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:15,343 INFO L93 Difference]: Finished difference Result 858 states and 1024 transitions. [2023-11-23 20:32:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-23 20:32:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) Word has length 74 [2023-11-23 20:32:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:15,348 INFO L225 Difference]: With dead ends: 858 [2023-11-23 20:32:15,348 INFO L226 Difference]: Without dead ends: 570 [2023-11-23 20:32:15,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1212, Invalid=7718, Unknown=0, NotChecked=0, Total=8930 [2023-11-23 20:32:15,353 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 529 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:15,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 539 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:32:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-23 20:32:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 503. [2023-11-23 20:32:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 352 states have (on average 1.1789772727272727) internal successors, (415), 392 states have internal predecessors, (415), 71 states have call successors, (71), 64 states have call predecessors, (71), 79 states have return successors, (111), 75 states have call predecessors, (111), 71 states have call successors, (111) [2023-11-23 20:32:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 597 transitions. [2023-11-23 20:32:15,426 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 597 transitions. Word has length 74 [2023-11-23 20:32:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:15,427 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 597 transitions. [2023-11-23 20:32:15,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-23 20:32:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 597 transitions. [2023-11-23 20:32:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 20:32:15,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:15,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 20:32:15,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:15,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff11e2d4-db63-4315-9b2f-99b22156a5e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:15,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:15,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 100834877, now seen corresponding path program 1 times [2023-11-23 20:32:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:15,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737092987] [2023-11-23 20:32:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:15,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat