./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:01:02,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:01:02,944 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:01:02,950 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:01:02,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:01:02,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:01:02,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:01:02,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:01:02,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:01:02,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:01:02,981 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:01:02,982 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:01:02,982 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:01:02,983 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:01:02,983 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:01:02,984 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:01:02,985 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:01:02,985 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:01:02,986 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:01:02,986 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:01:02,987 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:01:02,987 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:01:02,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:01:02,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:01:02,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:01:02,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:01:02,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:01:02,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:01:02,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:01:02,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:01:02,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:01:02,992 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:01:02,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:01:02,993 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:01:02,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:01:02,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:01:02,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:02,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:01:02,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:01:02,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:01:02,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:01:02,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:01:02,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:01:02,996 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:01:02,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:01:02,996 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_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2023-11-19 05:01:03,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:01:03,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:01:03,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:01:03,376 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:01:03,377 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:01:03,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-19 05:01:06,661 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:01:07,084 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:01:07,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-19 05:01:07,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/data/3f7c85565/f5b15fdb508548649b7c5ec05dd27d8b/FLAG8660865e1 [2023-11-19 05:01:07,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/data/3f7c85565/f5b15fdb508548649b7c5ec05dd27d8b [2023-11-19 05:01:07,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:01:07,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:01:07,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:07,148 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:01:07,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:01:07,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:07" (1/1) ... [2023-11-19 05:01:07,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8ef146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:07, skipping insertion in model container [2023-11-19 05:01:07,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:07" (1/1) ... [2023-11-19 05:01:07,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:01:07,475 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_d35c3651-0710-4758-a7d8-5e17f4f82d61/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-19 05:01:07,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:07,973 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:01:07,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-19 05:01:07,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [68] [2023-11-19 05:01:07,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [77] [2023-11-19 05:01:07,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [443] [2023-11-19 05:01:07,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2020] [2023-11-19 05:01:07,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2682] [2023-11-19 05:01:07,991 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2775] [2023-11-19 05:01:07,991 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2893] [2023-11-19 05:01:07,992 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2931] [2023-11-19 05:01:07,992 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [3279] [2023-11-19 05:01:08,003 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_d35c3651-0710-4758-a7d8-5e17f4f82d61/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-19 05:01:08,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:08,159 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:01:08,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08 WrapperNode [2023-11-19 05:01:08,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:08,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:08,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:01:08,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:01:08,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,282 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 838 [2023-11-19 05:01:08,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:08,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:01:08,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:01:08,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:01:08,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:01:08,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:01:08,443 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:01:08,443 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:01:08,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (1/1) ... [2023-11-19 05:01:08,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:08,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:08,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:01:08,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:01:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-19 05:01:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-19 05:01:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:01:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 05:01:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 05:01:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:01:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:01:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-19 05:01:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-19 05:01:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:01:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:01:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:01:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:01:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:01:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:01:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:01:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:01:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:01:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:01:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:01:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:01:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:01:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:01:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:01:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:01:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:01:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:01:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:01:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:01:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:01:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:01:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:01:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:01:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:01:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:01:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:01:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:01:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:01:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:01:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:01:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:01:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:01:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:01:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:01:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:01:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:01:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:01:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:01:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-19 05:01:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-19 05:01:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:01:08,538 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:01:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:01:08,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:01:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:01:08,538 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:01:08,777 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:01:08,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:01:10,109 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:01:11,126 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:01:11,127 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 05:01:11,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:11 BoogieIcfgContainer [2023-11-19 05:01:11,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:01:11,146 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:01:11,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:01:11,150 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:01:11,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:01:07" (1/3) ... [2023-11-19 05:01:11,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ea7d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:11, skipping insertion in model container [2023-11-19 05:01:11,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:08" (2/3) ... [2023-11-19 05:01:11,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ea7d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:11, skipping insertion in model container [2023-11-19 05:01:11,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:11" (3/3) ... [2023-11-19 05:01:11,155 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2023-11-19 05:01:11,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:01:11,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:01:11,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:01:11,274 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;@659af163, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:01:11,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:01:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 05:01:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 05:01:11,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:11,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:11,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:11,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash -219457398, now seen corresponding path program 1 times [2023-11-19 05:01:11,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907229379] [2023-11-19 05:01:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:01:11,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907229379] [2023-11-19 05:01:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907229379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089740068] [2023-11-19 05:01:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:11,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:11,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:01:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:12,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:01:12,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:01:12,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089740068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:12,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-11-19 05:01:12,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415880194] [2023-11-19 05:01:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:12,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:01:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:01:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:01:12,317 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:01:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:12,566 INFO L93 Difference]: Finished difference Result 816 states and 1311 transitions. [2023-11-19 05:01:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:01:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-19 05:01:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:12,590 INFO L225 Difference]: With dead ends: 816 [2023-11-19 05:01:12,591 INFO L226 Difference]: Without dead ends: 410 [2023-11-19 05:01:12,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:01:12,608 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:12,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-19 05:01:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-19 05:01:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 283 states have (on average 1.5724381625441697) internal successors, (445), 301 states have internal predecessors, (445), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-19 05:01:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 646 transitions. [2023-11-19 05:01:12,733 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 646 transitions. Word has length 58 [2023-11-19 05:01:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:12,735 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 646 transitions. [2023-11-19 05:01:12,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:01:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 646 transitions. [2023-11-19 05:01:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 05:01:12,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:12,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:12,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:12,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:01:12,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:12,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2011373226, now seen corresponding path program 1 times [2023-11-19 05:01:12,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:12,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7437176] [2023-11-19 05:01:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:13,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7437176] [2023-11-19 05:01:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7437176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:13,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:13,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:01:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132663035] [2023-11-19 05:01:13,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:13,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:01:13,503 INFO L87 Difference]: Start difference. First operand 410 states and 646 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:01:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:13,889 INFO L93 Difference]: Finished difference Result 1198 states and 1910 transitions. [2023-11-19 05:01:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2023-11-19 05:01:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:13,903 INFO L225 Difference]: With dead ends: 1198 [2023-11-19 05:01:13,903 INFO L226 Difference]: Without dead ends: 803 [2023-11-19 05:01:13,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:01:13,908 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 618 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:13,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1225 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:01:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-19 05:01:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 765. [2023-11-19 05:01:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 545 states have (on average 1.5926605504587157) internal successors, (868), 572 states have internal predecessors, (868), 176 states have call successors, (176), 46 states have call predecessors, (176), 43 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-11-19 05:01:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1223 transitions. [2023-11-19 05:01:14,006 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1223 transitions. Word has length 58 [2023-11-19 05:01:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:14,007 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1223 transitions. [2023-11-19 05:01:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:01:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1223 transitions. [2023-11-19 05:01:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:01:14,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:14,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:14,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:01:14,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:14,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1055192517, now seen corresponding path program 1 times [2023-11-19 05:01:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:14,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101193958] [2023-11-19 05:01:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:14,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101193958] [2023-11-19 05:01:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101193958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:14,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:01:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707316004] [2023-11-19 05:01:14,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:14,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:14,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:14,525 INFO L87 Difference]: Start difference. First operand 765 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:01:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:14,799 INFO L93 Difference]: Finished difference Result 1882 states and 3008 transitions. [2023-11-19 05:01:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2023-11-19 05:01:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:14,813 INFO L225 Difference]: With dead ends: 1882 [2023-11-19 05:01:14,813 INFO L226 Difference]: Without dead ends: 1132 [2023-11-19 05:01:14,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:14,824 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 465 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:14,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1951 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-11-19 05:01:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1102. [2023-11-19 05:01:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 791 states have (on average 1.563843236409608) internal successors, (1237), 817 states have internal predecessors, (1237), 245 states have call successors, (245), 66 states have call predecessors, (245), 65 states have return successors, (273), 232 states have call predecessors, (273), 239 states have call successors, (273) [2023-11-19 05:01:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1755 transitions. [2023-11-19 05:01:14,919 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1755 transitions. Word has length 87 [2023-11-19 05:01:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:14,921 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1755 transitions. [2023-11-19 05:01:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:01:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1755 transitions. [2023-11-19 05:01:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 05:01:14,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:14,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:01:14,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:14,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1418230265, now seen corresponding path program 1 times [2023-11-19 05:01:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:14,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224466275] [2023-11-19 05:01:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:14,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:15,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224466275] [2023-11-19 05:01:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224466275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:15,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:01:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904229711] [2023-11-19 05:01:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:15,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:01:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:01:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:01:15,456 INFO L87 Difference]: Start difference. First operand 1102 states and 1755 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-19 05:01:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:19,778 INFO L93 Difference]: Finished difference Result 3527 states and 5664 transitions. [2023-11-19 05:01:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 05:01:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 88 [2023-11-19 05:01:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:19,808 INFO L225 Difference]: With dead ends: 3527 [2023-11-19 05:01:19,808 INFO L226 Difference]: Without dead ends: 2442 [2023-11-19 05:01:19,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:01:19,825 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 1854 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1939 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:19,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1939 Valid, 2692 Invalid, 5197 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [566 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 05:01:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-11-19 05:01:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2146. [2023-11-19 05:01:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 1559 states have (on average 1.581783194355356) internal successors, (2466), 1604 states have internal predecessors, (2466), 455 states have call successors, (455), 122 states have call predecessors, (455), 131 states have return successors, (523), 446 states have call predecessors, (523), 447 states have call successors, (523) [2023-11-19 05:01:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3444 transitions. [2023-11-19 05:01:20,006 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3444 transitions. Word has length 88 [2023-11-19 05:01:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 2146 states and 3444 transitions. [2023-11-19 05:01:20,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-19 05:01:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3444 transitions. [2023-11-19 05:01:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 05:01:20,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:20,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:20,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:01:20,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:20,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash -679019943, now seen corresponding path program 1 times [2023-11-19 05:01:20,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:20,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034818750] [2023-11-19 05:01:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:20,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034818750] [2023-11-19 05:01:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034818750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:20,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:01:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764068671] [2023-11-19 05:01:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:20,438 INFO L87 Difference]: Start difference. First operand 2146 states and 3444 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:20,789 INFO L93 Difference]: Finished difference Result 3609 states and 5828 transitions. [2023-11-19 05:01:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2023-11-19 05:01:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:20,810 INFO L225 Difference]: With dead ends: 3609 [2023-11-19 05:01:20,811 INFO L226 Difference]: Without dead ends: 2216 [2023-11-19 05:01:20,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:20,827 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:20,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3625 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2023-11-19 05:01:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2188. [2023-11-19 05:01:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1589 states have (on average 1.5707992448080554) internal successors, (2496), 1634 states have internal predecessors, (2496), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 458 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-19 05:01:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3504 transitions. [2023-11-19 05:01:21,043 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3504 transitions. Word has length 92 [2023-11-19 05:01:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:21,045 INFO L495 AbstractCegarLoop]: Abstraction has 2188 states and 3504 transitions. [2023-11-19 05:01:21,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3504 transitions. [2023-11-19 05:01:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 05:01:21,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:21,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:21,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:01:21,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:21,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2030286334, now seen corresponding path program 1 times [2023-11-19 05:01:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465630547] [2023-11-19 05:01:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:21,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465630547] [2023-11-19 05:01:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465630547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:21,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:21,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:01:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567884008] [2023-11-19 05:01:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:21,439 INFO L87 Difference]: Start difference. First operand 2188 states and 3504 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:21,826 INFO L93 Difference]: Finished difference Result 3667 states and 5904 transitions. [2023-11-19 05:01:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-19 05:01:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:21,859 INFO L225 Difference]: With dead ends: 3667 [2023-11-19 05:01:21,859 INFO L226 Difference]: Without dead ends: 2246 [2023-11-19 05:01:21,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:21,875 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:21,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2023-11-19 05:01:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2194. [2023-11-19 05:01:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1595 states have (on average 1.5686520376175548) internal successors, (2502), 1634 states have internal predecessors, (2502), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 464 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-19 05:01:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3510 transitions. [2023-11-19 05:01:22,044 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3510 transitions. Word has length 93 [2023-11-19 05:01:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 3510 transitions. [2023-11-19 05:01:22,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3510 transitions. [2023-11-19 05:01:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 05:01:22,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:22,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:01:22,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:22,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1167229982, now seen corresponding path program 1 times [2023-11-19 05:01:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:22,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572920676] [2023-11-19 05:01:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:22,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:22,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:22,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572920676] [2023-11-19 05:01:22,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572920676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:22,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:22,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:01:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076981384] [2023-11-19 05:01:22,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:22,512 INFO L87 Difference]: Start difference. First operand 2194 states and 3510 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:22,857 INFO L93 Difference]: Finished difference Result 3677 states and 5914 transitions. [2023-11-19 05:01:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-19 05:01:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:22,881 INFO L225 Difference]: With dead ends: 3677 [2023-11-19 05:01:22,881 INFO L226 Difference]: Without dead ends: 2252 [2023-11-19 05:01:22,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:22,896 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:22,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2023-11-19 05:01:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2200. [2023-11-19 05:01:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 1601 states have (on average 1.566520924422236) internal successors, (2508), 1634 states have internal predecessors, (2508), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 470 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-19 05:01:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3516 transitions. [2023-11-19 05:01:23,112 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3516 transitions. Word has length 93 [2023-11-19 05:01:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 2200 states and 3516 transitions. [2023-11-19 05:01:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3516 transitions. [2023-11-19 05:01:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 05:01:23,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:23,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:01:23,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 427735558, now seen corresponding path program 1 times [2023-11-19 05:01:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175632957] [2023-11-19 05:01:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:23,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175632957] [2023-11-19 05:01:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175632957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:23,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:01:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960748269] [2023-11-19 05:01:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:23,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:23,477 INFO L87 Difference]: Start difference. First operand 2200 states and 3516 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 05:01:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:26,602 INFO L93 Difference]: Finished difference Result 5568 states and 9035 transitions. [2023-11-19 05:01:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:01:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2023-11-19 05:01:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:26,641 INFO L225 Difference]: With dead ends: 5568 [2023-11-19 05:01:26,642 INFO L226 Difference]: Without dead ends: 3897 [2023-11-19 05:01:26,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:26,664 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 1477 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1663 Valid, 2429 Invalid, 3002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [206 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 05:01:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2023-11-19 05:01:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3405. [2023-11-19 05:01:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 2446 states have (on average 1.5282093213409649) internal successors, (3738), 2503 states have internal predecessors, (3738), 722 states have call successors, (722), 204 states have call predecessors, (722), 236 states have return successors, (900), 737 states have call predecessors, (900), 710 states have call successors, (900) [2023-11-19 05:01:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5360 transitions. [2023-11-19 05:01:26,991 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5360 transitions. Word has length 97 [2023-11-19 05:01:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:26,992 INFO L495 AbstractCegarLoop]: Abstraction has 3405 states and 5360 transitions. [2023-11-19 05:01:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 05:01:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5360 transitions. [2023-11-19 05:01:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 05:01:26,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:26,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:01:26,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:26,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -149802034, now seen corresponding path program 1 times [2023-11-19 05:01:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156038823] [2023-11-19 05:01:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:27,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156038823] [2023-11-19 05:01:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156038823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:27,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:27,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:01:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099454976] [2023-11-19 05:01:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:27,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:27,369 INFO L87 Difference]: Start difference. First operand 3405 states and 5360 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 05:01:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:31,794 INFO L93 Difference]: Finished difference Result 11552 states and 19543 transitions. [2023-11-19 05:01:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:01:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2023-11-19 05:01:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:31,878 INFO L225 Difference]: With dead ends: 11552 [2023-11-19 05:01:31,879 INFO L226 Difference]: Without dead ends: 8162 [2023-11-19 05:01:31,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:01:31,919 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 2479 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 4035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:31,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1605 Invalid, 4035 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [992 Valid, 3043 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-19 05:01:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2023-11-19 05:01:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 7199. [2023-11-19 05:01:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 5162 states have (on average 1.512979465323518) internal successors, (7810), 5280 states have internal predecessors, (7810), 1535 states have call successors, (1535), 412 states have call predecessors, (1535), 501 states have return successors, (2368), 1602 states have call predecessors, (2368), 1513 states have call successors, (2368) [2023-11-19 05:01:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 11713 transitions. [2023-11-19 05:01:32,868 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 11713 transitions. Word has length 100 [2023-11-19 05:01:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:32,870 INFO L495 AbstractCegarLoop]: Abstraction has 7199 states and 11713 transitions. [2023-11-19 05:01:32,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 05:01:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 11713 transitions. [2023-11-19 05:01:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:01:32,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:32,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:32,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:01:32,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:32,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:32,881 INFO L85 PathProgramCache]: Analyzing trace with hash -567770121, now seen corresponding path program 1 times [2023-11-19 05:01:32,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:32,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328635545] [2023-11-19 05:01:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:33,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:33,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328635545] [2023-11-19 05:01:33,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328635545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:33,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:33,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:01:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742476482] [2023-11-19 05:01:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:33,163 INFO L87 Difference]: Start difference. First operand 7199 states and 11713 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:01:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:34,051 INFO L93 Difference]: Finished difference Result 13837 states and 23148 transitions. [2023-11-19 05:01:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:01:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2023-11-19 05:01:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:34,116 INFO L225 Difference]: With dead ends: 13837 [2023-11-19 05:01:34,116 INFO L226 Difference]: Without dead ends: 7775 [2023-11-19 05:01:34,159 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 [2023-11-19 05:01:34,160 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 216 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:34,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1660 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7775 states. [2023-11-19 05:01:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7775 to 7775. [2023-11-19 05:01:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 5714 states have (on average 1.5213510675533777) internal successors, (8693), 5856 states have internal predecessors, (8693), 1535 states have call successors, (1535), 412 states have call predecessors, (1535), 525 states have return successors, (2464), 1602 states have call predecessors, (2464), 1513 states have call successors, (2464) [2023-11-19 05:01:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 12692 transitions. [2023-11-19 05:01:34,846 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 12692 transitions. Word has length 102 [2023-11-19 05:01:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:34,847 INFO L495 AbstractCegarLoop]: Abstraction has 7775 states and 12692 transitions. [2023-11-19 05:01:34,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:01:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 12692 transitions. [2023-11-19 05:01:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 05:01:34,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:34,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:01:34,854 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:34,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -192867656, now seen corresponding path program 1 times [2023-11-19 05:01:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:34,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400032109] [2023-11-19 05:01:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:35,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400032109] [2023-11-19 05:01:35,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400032109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:35,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:01:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720292766] [2023-11-19 05:01:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:35,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:35,296 INFO L87 Difference]: Start difference. First operand 7775 states and 12692 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:01:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:39,244 INFO L93 Difference]: Finished difference Result 15629 states and 25997 transitions. [2023-11-19 05:01:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:01:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2023-11-19 05:01:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:39,326 INFO L225 Difference]: With dead ends: 15629 [2023-11-19 05:01:39,326 INFO L226 Difference]: Without dead ends: 9375 [2023-11-19 05:01:39,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:01:39,371 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 1114 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:39,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 1569 Invalid, 3370 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [415 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:01:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9375 states. [2023-11-19 05:01:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9375 to 7883. [2023-11-19 05:01:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 5786 states have (on average 1.517628759073626) internal successors, (8781), 5944 states have internal predecessors, (8781), 1539 states have call successors, (1539), 432 states have call predecessors, (1539), 557 states have return successors, (2508), 1602 states have call predecessors, (2508), 1517 states have call successors, (2508) [2023-11-19 05:01:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 12828 transitions. [2023-11-19 05:01:40,181 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 12828 transitions. Word has length 101 [2023-11-19 05:01:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:40,181 INFO L495 AbstractCegarLoop]: Abstraction has 7883 states and 12828 transitions. [2023-11-19 05:01:40,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:01:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 12828 transitions. [2023-11-19 05:01:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:01:40,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:40,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:01:40,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:40,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash 290439778, now seen corresponding path program 1 times [2023-11-19 05:01:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188807560] [2023-11-19 05:01:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:01:40,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188807560] [2023-11-19 05:01:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188807560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797408358] [2023-11-19 05:01:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:40,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:40,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:01:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:40,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:01:40,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:01:40,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797408358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-19 05:01:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106460967] [2023-11-19 05:01:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:40,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:40,843 INFO L87 Difference]: Start difference. First operand 7883 states and 12828 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:01:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:41,668 INFO L93 Difference]: Finished difference Result 15871 states and 26599 transitions. [2023-11-19 05:01:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2023-11-19 05:01:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:41,736 INFO L225 Difference]: With dead ends: 15871 [2023-11-19 05:01:41,736 INFO L226 Difference]: Without dead ends: 8003 [2023-11-19 05:01:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:41,808 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:41,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8003 states. [2023-11-19 05:01:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8003 to 8003. [2023-11-19 05:01:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 5886 states have (on average 1.5122324159021407) internal successors, (8901), 6044 states have internal predecessors, (8901), 1539 states have call successors, (1539), 452 states have call predecessors, (1539), 577 states have return successors, (2508), 1602 states have call predecessors, (2508), 1517 states have call successors, (2508) [2023-11-19 05:01:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 12948 transitions. [2023-11-19 05:01:42,563 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 12948 transitions. Word has length 105 [2023-11-19 05:01:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:42,564 INFO L495 AbstractCegarLoop]: Abstraction has 8003 states and 12948 transitions. [2023-11-19 05:01:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:01:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 12948 transitions. [2023-11-19 05:01:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:01:42,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:42,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:42,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:42,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:42,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:42,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1997131097, now seen corresponding path program 1 times [2023-11-19 05:01:42,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:42,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237952844] [2023-11-19 05:01:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:43,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237952844] [2023-11-19 05:01:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237952844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872462835] [2023-11-19 05:01:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:43,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:43,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:43,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:01:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:43,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:01:43,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:01:43,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872462835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:43,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:43,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 05:01:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013016344] [2023-11-19 05:01:43,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:43,464 INFO L87 Difference]: Start difference. First operand 8003 states and 12948 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:01:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:44,335 INFO L93 Difference]: Finished difference Result 16051 states and 26440 transitions. [2023-11-19 05:01:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2023-11-19 05:01:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:44,411 INFO L225 Difference]: With dead ends: 16051 [2023-11-19 05:01:44,411 INFO L226 Difference]: Without dead ends: 7983 [2023-11-19 05:01:44,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:44,490 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:44,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7983 states. [2023-11-19 05:01:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7983 to 7983. [2023-11-19 05:01:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7983 states, 5866 states have (on average 1.5037504261847938) internal successors, (8821), 6024 states have internal predecessors, (8821), 1539 states have call successors, (1539), 452 states have call predecessors, (1539), 577 states have return successors, (2508), 1602 states have call predecessors, (2508), 1517 states have call successors, (2508) [2023-11-19 05:01:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7983 states to 7983 states and 12868 transitions. [2023-11-19 05:01:45,297 INFO L78 Accepts]: Start accepts. Automaton has 7983 states and 12868 transitions. Word has length 107 [2023-11-19 05:01:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:45,298 INFO L495 AbstractCegarLoop]: Abstraction has 7983 states and 12868 transitions. [2023-11-19 05:01:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:01:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7983 states and 12868 transitions. [2023-11-19 05:01:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 05:01:45,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:45,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:45,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:45,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:01:45,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:45,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1635471714, now seen corresponding path program 1 times [2023-11-19 05:01:45,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:45,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966306355] [2023-11-19 05:01:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:45,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:01:45,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966306355] [2023-11-19 05:01:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966306355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52385432] [2023-11-19 05:01:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:45,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:45,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:45,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35c3651-0710-4758-a7d8-5e17f4f82d61/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:01:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:46,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:01:46,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:01:46,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:46,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52385432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:46,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:46,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 05:01:46,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202092524] [2023-11-19 05:01:46,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:46,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:46,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:46,363 INFO L87 Difference]: Start difference. First operand 7983 states and 12868 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)