./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:27,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:27,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:13:27,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:27,163 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:27,189 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:27,190 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:27,190 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:27,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:27,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:27,194 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:27,194 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:27,195 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:27,195 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:27,196 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:27,196 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:27,197 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:27,197 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:27,197 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:27,198 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:27,201 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:27,201 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:27,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:27,203 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:27,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:13:27,203 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:27,204 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:13:27,204 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:27,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:27,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:27,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:27,219 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:13:27,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:27,219 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:27,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:27,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:27,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:27,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:27,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:27,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:27,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:27,223 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:27,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:27,223 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:27,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:27,224 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:27,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:27,225 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_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 [2023-11-23 21:13:27,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:27,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:27,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:27,523 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:27,524 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:27,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-11-23 21:13:30,678 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:31,082 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:31,088 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-11-23 21:13:31,116 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/data/ae4dedf32/5be53699e040481a984ea964ea454af6/FLAG8a7771f21 [2023-11-23 21:13:31,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/data/ae4dedf32/5be53699e040481a984ea964ea454af6 [2023-11-23 21:13:31,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:31,133 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:31,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:31,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:31,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:31,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:31" (1/1) ... [2023-11-23 21:13:31,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca96b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:31, skipping insertion in model container [2023-11-23 21:13:31,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:31" (1/1) ... [2023-11-23 21:13:31,241 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:31,434 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_3e3681d1-6335-4570-bd55-6e1417062f9e/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2023-11-23 21:13:31,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:31,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:31,890 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-23 21:13:31,892 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [62] [2023-11-23 21:13:31,892 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [71] [2023-11-23 21:13:31,893 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [235] [2023-11-23 21:13:31,893 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [903] [2023-11-23 21:13:31,893 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1263] [2023-11-23 21:13:31,894 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1355] [2023-11-23 21:13:31,894 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1390] [2023-11-23 21:13:31,894 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1756] [2023-11-23 21:13:31,895 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3289] [2023-11-23 21:13:31,898 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_3e3681d1-6335-4570-bd55-6e1417062f9e/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2023-11-23 21:13:32,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:32,092 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:32,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32 WrapperNode [2023-11-23 21:13:32,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:32,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:32,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:32,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:32,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,206 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 863 [2023-11-23 21:13:32,207 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:32,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:32,208 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:32,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:32,222 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:32,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:32,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:32,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:32,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (1/1) ... [2023-11-23 21:13:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:32,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 21:13:32,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 21:13:32,486 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:13:32,486 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:13:32,486 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:13:32,486 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:13:32,486 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:13:32,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:13:32,487 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:13:32,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:13:32,487 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 21:13:32,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 21:13:32,488 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:13:32,488 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:13:32,488 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:13:32,488 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:13:32,488 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:13:32,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:13:32,489 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:13:32,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:13:32,489 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:13:32,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:13:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:13:32,490 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:13:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 21:13:32,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 21:13:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:13:32,491 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:13:32,491 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:13:32,491 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:13:32,491 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:13:32,491 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:13:32,492 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:13:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:13:32,492 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:13:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:13:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-23 21:13:32,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-23 21:13:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-23 21:13:32,493 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-23 21:13:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:13:32,494 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:13:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:13:32,494 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:13:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:13:32,494 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:13:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:32,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:13:32,495 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:13:32,653 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:32,661 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:33,779 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:34,784 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:34,785 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:13:34,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:34 BoogieIcfgContainer [2023-11-23 21:13:34,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:34,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:34,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:34,795 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:34,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:31" (1/3) ... [2023-11-23 21:13:34,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b80b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:34, skipping insertion in model container [2023-11-23 21:13:34,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:32" (2/3) ... [2023-11-23 21:13:34,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b80b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:34, skipping insertion in model container [2023-11-23 21:13:34,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:34" (3/3) ... [2023-11-23 21:13:34,800 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2023-11-23 21:13:34,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:34,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:34,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:34,913 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;@7dae0bd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:34,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 21:13:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:13:34,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:34,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:34,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:34,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1348057663, now seen corresponding path program 1 times [2023-11-23 21:13:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785853743] [2023-11-23 21:13:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:36,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785853743] [2023-11-23 21:13:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785853743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:36,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:36,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:13:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500374365] [2023-11-23 21:13:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:36,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:36,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:36,095 INFO L87 Difference]: Start difference. First operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 21:13:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:36,755 INFO L93 Difference]: Finished difference Result 815 states and 1317 transitions. [2023-11-23 21:13:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:13:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2023-11-23 21:13:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:36,778 INFO L225 Difference]: With dead ends: 815 [2023-11-23 21:13:36,778 INFO L226 Difference]: Without dead ends: 463 [2023-11-23 21:13:36,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:36,797 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 249 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:36,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2158 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:13:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-23 21:13:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2023-11-23 21:13:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 248 states have (on average 1.5766129032258065) internal successors, (391), 267 states have internal predecessors, (391), 92 states have call successors, (92), 24 states have call predecessors, (92), 23 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-23 21:13:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 570 transitions. [2023-11-23 21:13:36,904 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 570 transitions. Word has length 65 [2023-11-23 21:13:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:36,905 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 570 transitions. [2023-11-23 21:13:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 21:13:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 570 transitions. [2023-11-23 21:13:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:13:36,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:36,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:36,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:36,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:36,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash -53983098, now seen corresponding path program 1 times [2023-11-23 21:13:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:36,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115091574] [2023-11-23 21:13:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:36,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:37,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115091574] [2023-11-23 21:13:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115091574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:13:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177079579] [2023-11-23 21:13:37,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:37,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:13:37,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:13:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:13:37,537 INFO L87 Difference]: Start difference. First operand 364 states and 570 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:13:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:41,002 INFO L93 Difference]: Finished difference Result 1231 states and 1959 transitions. [2023-11-23 21:13:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:13:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 68 [2023-11-23 21:13:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:41,023 INFO L225 Difference]: With dead ends: 1231 [2023-11-23 21:13:41,023 INFO L226 Difference]: Without dead ends: 883 [2023-11-23 21:13:41,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:13:41,069 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1697 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:41,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 2137 Invalid, 3998 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [533 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:13:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-11-23 21:13:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2023-11-23 21:13:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 592 states have (on average 1.5962837837837838) internal successors, (945), 623 states have internal predecessors, (945), 193 states have call successors, (193), 48 states have call predecessors, (193), 52 states have return successors, (200), 191 states have call predecessors, (200), 188 states have call successors, (200) [2023-11-23 21:13:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1338 transitions. [2023-11-23 21:13:41,172 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1338 transitions. Word has length 68 [2023-11-23 21:13:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:41,173 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1338 transitions. [2023-11-23 21:13:41,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:13:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1338 transitions. [2023-11-23 21:13:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 21:13:41,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:41,179 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:41,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:13:41,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:41,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:41,180 INFO L85 PathProgramCache]: Analyzing trace with hash -20686558, now seen corresponding path program 1 times [2023-11-23 21:13:41,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:41,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066670208] [2023-11-23 21:13:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:41,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:41,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066670208] [2023-11-23 21:13:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066670208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:41,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:41,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:13:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8155404] [2023-11-23 21:13:41,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:41,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:13:41,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:13:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:41,592 INFO L87 Difference]: Start difference. First operand 838 states and 1338 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 21:13:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:41,908 INFO L93 Difference]: Finished difference Result 1399 states and 2241 transitions. [2023-11-23 21:13:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:13:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2023-11-23 21:13:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:41,917 INFO L225 Difference]: With dead ends: 1399 [2023-11-23 21:13:41,917 INFO L226 Difference]: Without dead ends: 905 [2023-11-23 21:13:41,920 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 [2023-11-23 21:13:41,922 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 30 mSDsluCounter, 2736 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3296 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-11-23 21:13:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 859. [2023-11-23 21:13:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 607 states have (on average 1.5815485996705108) internal successors, (960), 638 states have internal predecessors, (960), 193 states have call successors, (193), 48 states have call predecessors, (193), 58 states have return successors, (215), 197 states have call predecessors, (215), 188 states have call successors, (215) [2023-11-23 21:13:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1368 transitions. [2023-11-23 21:13:42,031 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1368 transitions. Word has length 72 [2023-11-23 21:13:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:42,032 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1368 transitions. [2023-11-23 21:13:42,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 21:13:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1368 transitions. [2023-11-23 21:13:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:13:42,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:42,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:13:42,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:42,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1397800578, now seen corresponding path program 1 times [2023-11-23 21:13:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393230057] [2023-11-23 21:13:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:42,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393230057] [2023-11-23 21:13:42,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393230057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:42,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:42,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:13:42,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245506780] [2023-11-23 21:13:42,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:42,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:13:42,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:13:42,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:42,388 INFO L87 Difference]: Start difference. First operand 859 states and 1368 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 21:13:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:42,654 INFO L93 Difference]: Finished difference Result 1428 states and 2279 transitions. [2023-11-23 21:13:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:13:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 73 [2023-11-23 21:13:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:42,663 INFO L225 Difference]: With dead ends: 1428 [2023-11-23 21:13:42,663 INFO L226 Difference]: Without dead ends: 920 [2023-11-23 21:13:42,666 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 [2023-11-23 21:13:42,667 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 30 mSDsluCounter, 2736 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:42,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3296 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-11-23 21:13:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 862. [2023-11-23 21:13:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 610 states have (on average 1.5786885245901638) internal successors, (963), 638 states have internal predecessors, (963), 193 states have call successors, (193), 48 states have call predecessors, (193), 58 states have return successors, (215), 200 states have call predecessors, (215), 188 states have call successors, (215) [2023-11-23 21:13:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1371 transitions. [2023-11-23 21:13:42,732 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1371 transitions. Word has length 73 [2023-11-23 21:13:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:42,733 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1371 transitions. [2023-11-23 21:13:42,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 21:13:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1371 transitions. [2023-11-23 21:13:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:13:42,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:42,737 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:42,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:13:42,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:42,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 774140830, now seen corresponding path program 1 times [2023-11-23 21:13:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405044177] [2023-11-23 21:13:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:44,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405044177] [2023-11-23 21:13:44,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405044177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:44,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:44,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:13:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517874761] [2023-11-23 21:13:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:44,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:13:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:13:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:44,166 INFO L87 Difference]: Start difference. First operand 862 states and 1371 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-23 21:13:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:48,503 INFO L93 Difference]: Finished difference Result 3734 states and 6061 transitions. [2023-11-23 21:13:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:13:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 73 [2023-11-23 21:13:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:48,528 INFO L225 Difference]: With dead ends: 3734 [2023-11-23 21:13:48,529 INFO L226 Difference]: Without dead ends: 2889 [2023-11-23 21:13:48,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:13:48,536 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 2527 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:48,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2626 Valid, 1419 Invalid, 3511 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1129 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 21:13:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2023-11-23 21:13:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2617. [2023-11-23 21:13:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 1846 states have (on average 1.573131094257855) internal successors, (2904), 1950 states have internal predecessors, (2904), 607 states have call successors, (607), 129 states have call predecessors, (607), 163 states have return successors, (697), 608 states have call predecessors, (697), 602 states have call successors, (697) [2023-11-23 21:13:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 4208 transitions. [2023-11-23 21:13:48,887 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 4208 transitions. Word has length 73 [2023-11-23 21:13:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:48,888 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 4208 transitions. [2023-11-23 21:13:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-23 21:13:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 4208 transitions. [2023-11-23 21:13:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 21:13:48,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:48,892 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:48,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:48,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -107376064, now seen corresponding path program 1 times [2023-11-23 21:13:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:48,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881750701] [2023-11-23 21:13:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:49,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881750701] [2023-11-23 21:13:49,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881750701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:49,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:49,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:13:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659060592] [2023-11-23 21:13:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:49,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:13:49,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:13:49,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:49,285 INFO L87 Difference]: Start difference. First operand 2617 states and 4208 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-23 21:13:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:52,040 INFO L93 Difference]: Finished difference Result 5834 states and 9425 transitions. [2023-11-23 21:13:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:13:52,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 79 [2023-11-23 21:13:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:52,086 INFO L225 Difference]: With dead ends: 5834 [2023-11-23 21:13:52,087 INFO L226 Difference]: Without dead ends: 3905 [2023-11-23 21:13:52,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:13:52,102 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1321 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:52,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 1390 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:13:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2023-11-23 21:13:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3773. [2023-11-23 21:13:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 2615 states have (on average 1.530019120458891) internal successors, (4001), 2778 states have internal predecessors, (4001), 899 states have call successors, (899), 211 states have call predecessors, (899), 258 states have return successors, (1058), 889 states have call predecessors, (1058), 894 states have call successors, (1058) [2023-11-23 21:13:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5958 transitions. [2023-11-23 21:13:52,737 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5958 transitions. Word has length 79 [2023-11-23 21:13:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:52,738 INFO L495 AbstractCegarLoop]: Abstraction has 3773 states and 5958 transitions. [2023-11-23 21:13:52,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-23 21:13:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5958 transitions. [2023-11-23 21:13:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-23 21:13:52,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:52,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:52,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:13:52,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:52,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1712722197, now seen corresponding path program 1 times [2023-11-23 21:13:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729947181] [2023-11-23 21:13:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:53,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729947181] [2023-11-23 21:13:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729947181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:53,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:13:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55177234] [2023-11-23 21:13:53,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:53,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:13:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:13:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:53,082 INFO L87 Difference]: Start difference. First operand 3773 states and 5958 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-23 21:13:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:55,682 INFO L93 Difference]: Finished difference Result 6996 states and 11083 transitions. [2023-11-23 21:13:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:13:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2023-11-23 21:13:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:55,716 INFO L225 Difference]: With dead ends: 6996 [2023-11-23 21:13:55,716 INFO L226 Difference]: Without dead ends: 4136 [2023-11-23 21:13:55,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:13:55,735 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 955 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:55,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1370 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:13:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2023-11-23 21:13:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3854. [2023-11-23 21:13:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 2669 states have (on average 1.5237916822780067) internal successors, (4067), 2844 states have internal predecessors, (4067), 902 states have call successors, (902), 226 states have call predecessors, (902), 282 states have return successors, (1092), 889 states have call predecessors, (1092), 897 states have call successors, (1092) [2023-11-23 21:13:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6061 transitions. [2023-11-23 21:13:56,237 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6061 transitions. Word has length 81 [2023-11-23 21:13:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,238 INFO L495 AbstractCegarLoop]: Abstraction has 3854 states and 6061 transitions. [2023-11-23 21:13:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-23 21:13:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6061 transitions. [2023-11-23 21:13:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:13:56,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,241 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:13:56,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:13:56,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1250728478, now seen corresponding path program 1 times [2023-11-23 21:13:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784767963] [2023-11-23 21:13:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:13:56,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784767963] [2023-11-23 21:13:56,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784767963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:56,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:13:56,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893291875] [2023-11-23 21:13:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:13:56,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:13:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:56,499 INFO L87 Difference]: Start difference. First operand 3854 states and 6061 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:13:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:57,376 INFO L93 Difference]: Finished difference Result 3958 states and 6223 transitions. [2023-11-23 21:13:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:13:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 85 [2023-11-23 21:13:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:57,414 INFO L225 Difference]: With dead ends: 3958 [2023-11-23 21:13:57,414 INFO L226 Difference]: Without dead ends: 3943 [2023-11-23 21:13:57,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:57,419 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 660 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:57,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1395 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:13:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2023-11-23 21:13:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3860. [2023-11-23 21:13:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 2675 states have (on average 1.5226168224299066) internal successors, (4073), 2850 states have internal predecessors, (4073), 902 states have call successors, (902), 226 states have call predecessors, (902), 282 states have return successors, (1092), 889 states have call predecessors, (1092), 897 states have call successors, (1092) [2023-11-23 21:13:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 6067 transitions. [2023-11-23 21:13:57,967 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 6067 transitions. Word has length 85 [2023-11-23 21:13:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:57,968 INFO L495 AbstractCegarLoop]: Abstraction has 3860 states and 6067 transitions. [2023-11-23 21:13:57,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:13:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 6067 transitions. [2023-11-23 21:13:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 21:13:57,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:57,973 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:13:57,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:13:57,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:57,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash 772212512, now seen corresponding path program 1 times [2023-11-23 21:13:57,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:57,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246419009] [2023-11-23 21:13:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:13:58,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:58,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246419009] [2023-11-23 21:13:58,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246419009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:58,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:58,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:13:58,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203688197] [2023-11-23 21:13:58,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:58,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:13:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:13:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:13:58,388 INFO L87 Difference]: Start difference. First operand 3860 states and 6067 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 21:13:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:59,237 INFO L93 Difference]: Finished difference Result 7238 states and 11534 transitions. [2023-11-23 21:13:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:13:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2023-11-23 21:13:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:59,274 INFO L225 Difference]: With dead ends: 7238 [2023-11-23 21:13:59,275 INFO L226 Difference]: Without dead ends: 4070 [2023-11-23 21:13:59,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:13:59,298 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 358 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 3844 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 3844 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:13:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2023-11-23 21:13:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 4060. [2023-11-23 21:13:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2861 states have (on average 1.5005242922055226) internal successors, (4293), 3040 states have internal predecessors, (4293), 907 states have call successors, (907), 231 states have call predecessors, (907), 291 states have return successors, (1095), 894 states have call predecessors, (1095), 902 states have call successors, (1095) [2023-11-23 21:13:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6295 transitions. [2023-11-23 21:13:59,767 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6295 transitions. Word has length 91 [2023-11-23 21:13:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:59,768 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6295 transitions. [2023-11-23 21:13:59,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 21:13:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6295 transitions. [2023-11-23 21:13:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-23 21:13:59,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:59,772 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:13:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:13:59,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:59,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash -833654188, now seen corresponding path program 1 times [2023-11-23 21:13:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:59,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426868645] [2023-11-23 21:13:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:59,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:14:01,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426868645] [2023-11-23 21:14:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426868645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934886753] [2023-11-23 21:14:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:01,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:01,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:01,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:01,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:14:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:01,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:14:01,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:14:01,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934886753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:01,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:01,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2023-11-23 21:14:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549746693] [2023-11-23 21:14:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:01,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:14:01,841 INFO L87 Difference]: Start difference. First operand 4060 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:14:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:02,780 INFO L93 Difference]: Finished difference Result 10905 states and 17049 transitions. [2023-11-23 21:14:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-23 21:14:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:02,882 INFO L225 Difference]: With dead ends: 10905 [2023-11-23 21:14:02,882 INFO L226 Difference]: Without dead ends: 6864 [2023-11-23 21:14:02,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:14:02,899 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 518 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:02,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1095 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:14:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6864 states. [2023-11-23 21:14:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6864 to 6748. [2023-11-23 21:14:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 4807 states have (on average 1.5113376326190973) internal successors, (7265), 5115 states have internal predecessors, (7265), 1461 states have call successors, (1461), 375 states have call predecessors, (1461), 479 states have return successors, (1826), 1396 states have call predecessors, (1826), 1456 states have call successors, (1826) [2023-11-23 21:14:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 10552 transitions. [2023-11-23 21:14:03,635 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 10552 transitions. Word has length 97 [2023-11-23 21:14:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:03,636 INFO L495 AbstractCegarLoop]: Abstraction has 6748 states and 10552 transitions. [2023-11-23 21:14:03,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:14:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 10552 transitions. [2023-11-23 21:14:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 21:14:03,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:03,642 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:14:03,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:14:03,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:03,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -73605120, now seen corresponding path program 1 times [2023-11-23 21:14:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:03,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322766248] [2023-11-23 21:14:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:14:05,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322766248] [2023-11-23 21:14:05,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322766248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579086054] [2023-11-23 21:14:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:05,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:05,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:14:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:05,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:14:05,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:14:05,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579086054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:05,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:05,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2023-11-23 21:14:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451376468] [2023-11-23 21:14:05,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:05,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:05,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:05,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:14:05,730 INFO L87 Difference]: Start difference. First operand 6748 states and 10552 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:14:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:07,117 INFO L93 Difference]: Finished difference Result 18968 states and 29945 transitions. [2023-11-23 21:14:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2023-11-23 21:14:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:07,210 INFO L225 Difference]: With dead ends: 18968 [2023-11-23 21:14:07,211 INFO L226 Difference]: Without dead ends: 12242 [2023-11-23 21:14:07,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:14:07,254 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 517 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:07,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1112 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:14:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12242 states. [2023-11-23 21:14:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 12125. [2023-11-23 21:14:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12125 states, 8700 states have (on average 1.5175862068965518) internal successors, (13203), 9266 states have internal predecessors, (13203), 2569 states have call successors, (2569), 663 states have call predecessors, (2569), 855 states have return successors, (3360), 2400 states have call predecessors, (3360), 2564 states have call successors, (3360) [2023-11-23 21:14:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12125 states to 12125 states and 19132 transitions. [2023-11-23 21:14:08,646 INFO L78 Accepts]: Start accepts. Automaton has 12125 states and 19132 transitions. Word has length 98 [2023-11-23 21:14:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:08,647 INFO L495 AbstractCegarLoop]: Abstraction has 12125 states and 19132 transitions. [2023-11-23 21:14:08,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:14:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12125 states and 19132 transitions. [2023-11-23 21:14:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 21:14:08,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:08,651 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:14:08,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:08,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:08,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:08,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1206041048, now seen corresponding path program 1 times [2023-11-23 21:14:08,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:08,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210547237] [2023-11-23 21:14:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:08,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:14:10,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210547237] [2023-11-23 21:14:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210547237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999690676] [2023-11-23 21:14:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:10,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:10,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:10,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:10,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e3681d1-6335-4570-bd55-6e1417062f9e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:14:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:10,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:14:10,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:14:10,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999690676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2023-11-23 21:14:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994216455] [2023-11-23 21:14:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:14:10,580 INFO L87 Difference]: Start difference. First operand 12125 states and 19132 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17)