./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:41,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:41,095 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:41,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:41,102 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:41,129 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:41,129 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:41,130 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:41,131 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:41,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:41,132 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:41,133 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:41,133 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:41,134 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:41,134 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:41,135 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:41,135 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:41,136 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:41,136 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:41,137 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:41,137 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:41,138 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:41,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:41,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:41,140 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:41,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:41,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:41,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:41,141 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:41,142 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:41,142 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:41,143 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:41,143 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:41,143 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:41,144 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:41,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:41,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:41,144 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:41,144 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:41,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:41,145 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:41,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:41,145 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:41,146 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:41,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:41,146 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_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2023-11-12 00:56:41,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:41,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:41,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:41,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:41,442 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:41,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-12 00:56:44,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:45,033 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:45,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-12 00:56:45,066 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/data/b2d1773bf/f987ed25eda543c3b48c63d1000d909b/FLAG070b2775c [2023-11-12 00:56:45,085 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/data/b2d1773bf/f987ed25eda543c3b48c63d1000d909b [2023-11-12 00:56:45,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:45,095 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:45,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:45,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:45,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:45,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:45,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b8b5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45, skipping insertion in model container [2023-11-12 00:56:45,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:45,208 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:45,428 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_b9906c1d-d981-4035-b1f9-7271148d24a1/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-12 00:56:45,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:45,841 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:45,852 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-12 00:56:45,854 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [68] [2023-11-12 00:56:45,855 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [77] [2023-11-12 00:56:45,855 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [443] [2023-11-12 00:56:45,855 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2020] [2023-11-12 00:56:45,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2682] [2023-11-12 00:56:45,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2775] [2023-11-12 00:56:45,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2893] [2023-11-12 00:56:45,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2931] [2023-11-12 00:56:45,857 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [3279] [2023-11-12 00:56:45,861 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_b9906c1d-d981-4035-b1f9-7271148d24a1/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-12 00:56:45,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:45,994 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:45,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45 WrapperNode [2023-11-12 00:56:45,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:45,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:45,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:45,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:46,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,127 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 838 [2023-11-12 00:56:46,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:46,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:46,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:46,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:46,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:46,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:46,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:46,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:46,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (1/1) ... [2023-11-12 00:56:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:46,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:46,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:46,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-12 00:56:46,376 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-12 00:56:46,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:46,376 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-12 00:56:46,376 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-12 00:56:46,376 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:56:46,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:56:46,378 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-12 00:56:46,378 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-12 00:56:46,378 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:56:46,378 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:56:46,378 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:56:46,379 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:56:46,379 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-12 00:56:46,380 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-12 00:56:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:56:46,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:56:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:56:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:56:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:56:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:56:46,385 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:56:46,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:56:46,385 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:56:46,386 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:56:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:56:46,386 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:56:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:56:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:56:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:56:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:56:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:56:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:56:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:56:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:56:46,428 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:56:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:56:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:56:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 00:56:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 00:56:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:56:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:56:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:56:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:56:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:56:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:56:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-12 00:56:46,431 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-12 00:56:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:56:46,432 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:56:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:56:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:56:46,634 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:46,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:48,117 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:49,028 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:49,029 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:56:49,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:49 BoogieIcfgContainer [2023-11-12 00:56:49,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:49,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:49,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:49,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:49,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:45" (1/3) ... [2023-11-12 00:56:49,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2927dac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:49, skipping insertion in model container [2023-11-12 00:56:49,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:45" (2/3) ... [2023-11-12 00:56:49,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2927dac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:49, skipping insertion in model container [2023-11-12 00:56:49,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:49" (3/3) ... [2023-11-12 00:56:49,047 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2023-11-12 00:56:49,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:49,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:56:49,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:49,166 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;@4ddced7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:49,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:56:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-12 00:56:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 00:56:49,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:49,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:49,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -219457398, now seen corresponding path program 1 times [2023-11-12 00:56:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:49,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229086617] [2023-11-12 00:56:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:56:49,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229086617] [2023-11-12 00:56:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229086617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:56:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661258938] [2023-11-12 00:56:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:49,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:49,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:56:49,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:56:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:50,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:56:50,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:56:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:56:50,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:56:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661258938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:50,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:56:50,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-11-12 00:56:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391754064] [2023-11-12 00:56:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:56:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:56:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:50,233 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:56:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:50,410 INFO L93 Difference]: Finished difference Result 816 states and 1311 transitions. [2023-11-12 00:56:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:56:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-12 00:56:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:50,433 INFO L225 Difference]: With dead ends: 816 [2023-11-12 00:56:50,434 INFO L226 Difference]: Without dead ends: 410 [2023-11-12 00:56:50,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:50,447 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:50,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-12 00:56:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-12 00:56:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 283 states have (on average 1.5724381625441697) internal successors, (445), 301 states have internal predecessors, (445), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-12 00:56:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 646 transitions. [2023-11-12 00:56:50,534 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 646 transitions. Word has length 58 [2023-11-12 00:56:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:50,536 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 646 transitions. [2023-11-12 00:56:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:56:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 646 transitions. [2023-11-12 00:56:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 00:56:50,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:50,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:50,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:56:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:56:50,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:50,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2011373226, now seen corresponding path program 1 times [2023-11-12 00:56:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460509740] [2023-11-12 00:56:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:56:51,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460509740] [2023-11-12 00:56:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460509740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:51,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:51,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357525506] [2023-11-12 00:56:51,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:51,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:51,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:51,387 INFO L87 Difference]: Start difference. First operand 410 states and 646 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:51,713 INFO L93 Difference]: Finished difference Result 1198 states and 1910 transitions. [2023-11-12 00:56:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2023-11-12 00:56:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:51,724 INFO L225 Difference]: With dead ends: 1198 [2023-11-12 00:56:51,724 INFO L226 Difference]: Without dead ends: 803 [2023-11-12 00:56:51,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:51,729 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 618 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:51,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1225 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-12 00:56:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 765. [2023-11-12 00:56:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 545 states have (on average 1.5926605504587157) internal successors, (868), 572 states have internal predecessors, (868), 176 states have call successors, (176), 46 states have call predecessors, (176), 43 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-11-12 00:56:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1223 transitions. [2023-11-12 00:56:51,851 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1223 transitions. Word has length 58 [2023-11-12 00:56:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:51,852 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1223 transitions. [2023-11-12 00:56:51,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1223 transitions. [2023-11-12 00:56:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:56:51,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:51,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:51,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1055192517, now seen corresponding path program 1 times [2023-11-12 00:56:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172192586] [2023-11-12 00:56:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:51,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:56:52,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:52,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172192586] [2023-11-12 00:56:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172192586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:52,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:52,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:56:52,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499422543] [2023-11-12 00:56:52,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:52,373 INFO L87 Difference]: Start difference. First operand 765 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:56:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:52,651 INFO L93 Difference]: Finished difference Result 1882 states and 3008 transitions. [2023-11-12 00:56:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2023-11-12 00:56:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:52,665 INFO L225 Difference]: With dead ends: 1882 [2023-11-12 00:56:52,666 INFO L226 Difference]: Without dead ends: 1132 [2023-11-12 00:56:52,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:52,675 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 465 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:52,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1951 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-11-12 00:56:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1102. [2023-11-12 00:56:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 791 states have (on average 1.563843236409608) internal successors, (1237), 817 states have internal predecessors, (1237), 245 states have call successors, (245), 66 states have call predecessors, (245), 65 states have return successors, (273), 232 states have call predecessors, (273), 239 states have call successors, (273) [2023-11-12 00:56:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1755 transitions. [2023-11-12 00:56:52,824 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1755 transitions. Word has length 87 [2023-11-12 00:56:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:52,826 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1755 transitions. [2023-11-12 00:56:52,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:56:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1755 transitions. [2023-11-12 00:56:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:56:52,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:52,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:52,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:52,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1418230265, now seen corresponding path program 1 times [2023-11-12 00:56:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:52,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546965435] [2023-11-12 00:56:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:56:53,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546965435] [2023-11-12 00:56:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546965435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:53,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:53,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:56:53,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281627206] [2023-11-12 00:56:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:53,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:56:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:56:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:56:53,344 INFO L87 Difference]: Start difference. First operand 1102 states and 1755 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-12 00:56:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:57,804 INFO L93 Difference]: Finished difference Result 3527 states and 5664 transitions. [2023-11-12 00:56:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 00:56:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 88 [2023-11-12 00:56:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:57,831 INFO L225 Difference]: With dead ends: 3527 [2023-11-12 00:56:57,831 INFO L226 Difference]: Without dead ends: 2442 [2023-11-12 00:56:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:56:57,843 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1854 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 4637 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 4637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:57,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 2684 Invalid, 5201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [564 Valid, 4637 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-12 00:56:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-11-12 00:56:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2146. [2023-11-12 00:56:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 1559 states have (on average 1.581783194355356) internal successors, (2466), 1604 states have internal predecessors, (2466), 455 states have call successors, (455), 122 states have call predecessors, (455), 131 states have return successors, (523), 446 states have call predecessors, (523), 447 states have call successors, (523) [2023-11-12 00:56:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3444 transitions. [2023-11-12 00:56:58,052 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3444 transitions. Word has length 88 [2023-11-12 00:56:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:58,052 INFO L495 AbstractCegarLoop]: Abstraction has 2146 states and 3444 transitions. [2023-11-12 00:56:58,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-12 00:56:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3444 transitions. [2023-11-12 00:56:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 00:56:58,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:58,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:58,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:58,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -679019943, now seen corresponding path program 1 times [2023-11-12 00:56:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:58,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525784023] [2023-11-12 00:56:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:56:58,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525784023] [2023-11-12 00:56:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525784023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:58,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:58,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:56:58,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932441418] [2023-11-12 00:56:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:56:58,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:56:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:58,453 INFO L87 Difference]: Start difference. First operand 2146 states and 3444 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:56:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:58,810 INFO L93 Difference]: Finished difference Result 3609 states and 5828 transitions. [2023-11-12 00:56:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2023-11-12 00:56:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:58,889 INFO L225 Difference]: With dead ends: 3609 [2023-11-12 00:56:58,891 INFO L226 Difference]: Without dead ends: 2216 [2023-11-12 00:56:58,904 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 [2023-11-12 00:56:58,907 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:58,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3625 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2023-11-12 00:56:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2188. [2023-11-12 00:56:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1589 states have (on average 1.5707992448080554) internal successors, (2496), 1634 states have internal predecessors, (2496), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 458 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-12 00:56:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3504 transitions. [2023-11-12 00:56:59,072 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3504 transitions. Word has length 92 [2023-11-12 00:56:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:59,074 INFO L495 AbstractCegarLoop]: Abstraction has 2188 states and 3504 transitions. [2023-11-12 00:56:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:56:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3504 transitions. [2023-11-12 00:56:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:56:59,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:59,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:59,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:59,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2030286334, now seen corresponding path program 1 times [2023-11-12 00:56:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731304728] [2023-11-12 00:56:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:56:59,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:59,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731304728] [2023-11-12 00:56:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731304728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:59,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:59,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:56:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876416296] [2023-11-12 00:56:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:56:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:56:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:59,427 INFO L87 Difference]: Start difference. First operand 2188 states and 3504 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:56:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:59,787 INFO L93 Difference]: Finished difference Result 3667 states and 5904 transitions. [2023-11-12 00:56:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-12 00:56:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:59,807 INFO L225 Difference]: With dead ends: 3667 [2023-11-12 00:56:59,808 INFO L226 Difference]: Without dead ends: 2246 [2023-11-12 00:56:59,820 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 [2023-11-12 00:56:59,822 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:59,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2023-11-12 00:56:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2194. [2023-11-12 00:56:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1595 states have (on average 1.5686520376175548) internal successors, (2502), 1634 states have internal predecessors, (2502), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 464 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-12 00:56:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3510 transitions. [2023-11-12 00:56:59,980 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3510 transitions. Word has length 93 [2023-11-12 00:56:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:59,981 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 3510 transitions. [2023-11-12 00:56:59,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:56:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3510 transitions. [2023-11-12 00:56:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:56:59,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:59,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:59,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:59,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:59,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1167229982, now seen corresponding path program 1 times [2023-11-12 00:56:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111772826] [2023-11-12 00:56:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:00,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111772826] [2023-11-12 00:57:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111772826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:57:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102504614] [2023-11-12 00:57:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:57:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:57:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:00,365 INFO L87 Difference]: Start difference. First operand 2194 states and 3510 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:57:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:00,735 INFO L93 Difference]: Finished difference Result 3677 states and 5914 transitions. [2023-11-12 00:57:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:57:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-12 00:57:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:00,763 INFO L225 Difference]: With dead ends: 3677 [2023-11-12 00:57:00,763 INFO L226 Difference]: Without dead ends: 2252 [2023-11-12 00:57:00,776 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 [2023-11-12 00:57:00,777 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:00,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:57:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2023-11-12 00:57:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2200. [2023-11-12 00:57:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 1601 states have (on average 1.566520924422236) internal successors, (2508), 1634 states have internal predecessors, (2508), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 470 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-12 00:57:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3516 transitions. [2023-11-12 00:57:00,944 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3516 transitions. Word has length 93 [2023-11-12 00:57:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:00,946 INFO L495 AbstractCegarLoop]: Abstraction has 2200 states and 3516 transitions. [2023-11-12 00:57:00,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:57:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3516 transitions. [2023-11-12 00:57:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:57:00,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:00,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:00,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:57:00,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:00,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash 427735558, now seen corresponding path program 1 times [2023-11-12 00:57:00,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:00,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208304703] [2023-11-12 00:57:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:00,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:01,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208304703] [2023-11-12 00:57:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208304703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:01,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:01,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:57:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863743651] [2023-11-12 00:57:01,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:01,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:57:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:01,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:57:01,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:01,361 INFO L87 Difference]: Start difference. First operand 2200 states and 3516 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 00:57:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:04,475 INFO L93 Difference]: Finished difference Result 5568 states and 9035 transitions. [2023-11-12 00:57:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:57:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2023-11-12 00:57:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:04,511 INFO L225 Difference]: With dead ends: 5568 [2023-11-12 00:57:04,511 INFO L226 Difference]: Without dead ends: 3897 [2023-11-12 00:57:04,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:04,530 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 1477 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:04,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1663 Valid, 2429 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 00:57:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2023-11-12 00:57:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3405. [2023-11-12 00:57:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 2446 states have (on average 1.5282093213409649) internal successors, (3738), 2503 states have internal predecessors, (3738), 722 states have call successors, (722), 204 states have call predecessors, (722), 236 states have return successors, (900), 737 states have call predecessors, (900), 710 states have call successors, (900) [2023-11-12 00:57:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5360 transitions. [2023-11-12 00:57:04,836 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5360 transitions. Word has length 97 [2023-11-12 00:57:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:04,837 INFO L495 AbstractCegarLoop]: Abstraction has 3405 states and 5360 transitions. [2023-11-12 00:57:04,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 00:57:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5360 transitions. [2023-11-12 00:57:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:57:04,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:04,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:57:04,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:04,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash 127644620, now seen corresponding path program 1 times [2023-11-12 00:57:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455922113] [2023-11-12 00:57:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:05,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455922113] [2023-11-12 00:57:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455922113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:05,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:57:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668304380] [2023-11-12 00:57:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:05,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:57:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:57:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:05,359 INFO L87 Difference]: Start difference. First operand 3405 states and 5360 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 00:57:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:06,112 INFO L93 Difference]: Finished difference Result 6789 states and 10872 transitions. [2023-11-12 00:57:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:57:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2023-11-12 00:57:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:06,150 INFO L225 Difference]: With dead ends: 6789 [2023-11-12 00:57:06,150 INFO L226 Difference]: Without dead ends: 3865 [2023-11-12 00:57:06,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:57:06,218 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 723 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 4975 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:06,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 4975 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2023-11-12 00:57:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3813. [2023-11-12 00:57:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 2822 states have (on average 1.5329553508150249) internal successors, (4326), 2891 states have internal predecessors, (4326), 732 states have call successors, (732), 214 states have call predecessors, (732), 258 states have return successors, (910), 747 states have call predecessors, (910), 720 states have call successors, (910) [2023-11-12 00:57:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5968 transitions. [2023-11-12 00:57:06,622 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5968 transitions. Word has length 100 [2023-11-12 00:57:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:06,624 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 5968 transitions. [2023-11-12 00:57:06,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 00:57:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5968 transitions. [2023-11-12 00:57:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:57:06,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:06,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:57:06,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:06,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 809084981, now seen corresponding path program 1 times [2023-11-12 00:57:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:06,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252657503] [2023-11-12 00:57:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:06,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:06,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252657503] [2023-11-12 00:57:06,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252657503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:06,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:06,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:57:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628811274] [2023-11-12 00:57:06,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:57:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:57:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:06,984 INFO L87 Difference]: Start difference. First operand 3813 states and 5968 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-12 00:57:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:10,040 INFO L93 Difference]: Finished difference Result 7721 states and 12248 transitions. [2023-11-12 00:57:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:57:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2023-11-12 00:57:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:10,116 INFO L225 Difference]: With dead ends: 7721 [2023-11-12 00:57:10,116 INFO L226 Difference]: Without dead ends: 4657 [2023-11-12 00:57:10,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:57:10,132 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1104 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 3063 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:10,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1748 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3063 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 00:57:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2023-11-12 00:57:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 3867. [2023-11-12 00:57:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 2858 states have (on average 1.5290412876137158) internal successors, (4370), 2935 states have internal predecessors, (4370), 734 states have call successors, (734), 224 states have call predecessors, (734), 274 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-12 00:57:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6036 transitions. [2023-11-12 00:57:10,507 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6036 transitions. Word has length 102 [2023-11-12 00:57:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:10,508 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 6036 transitions. [2023-11-12 00:57:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-12 00:57:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6036 transitions. [2023-11-12 00:57:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-12 00:57:10,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:10,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:10,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:57:10,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:10,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -342404769, now seen corresponding path program 1 times [2023-11-12 00:57:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48870439] [2023-11-12 00:57:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:10,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:57:10,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48870439] [2023-11-12 00:57:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48870439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810532203] [2023-11-12 00:57:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:10,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:10,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:57:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:11,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:57:11,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:57:11,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810532203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:11,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-12 00:57:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948899199] [2023-11-12 00:57:11,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:11,122 INFO L87 Difference]: Start difference. First operand 3867 states and 6036 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:11,539 INFO L93 Difference]: Finished difference Result 7779 states and 12324 transitions. [2023-11-12 00:57:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:57:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2023-11-12 00:57:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:11,565 INFO L225 Difference]: With dead ends: 7779 [2023-11-12 00:57:11,565 INFO L226 Difference]: Without dead ends: 3927 [2023-11-12 00:57:11,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:57:11,584 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:11,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-11-12 00:57:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3927. [2023-11-12 00:57:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 2908 states have (on average 1.5233837689133425) internal successors, (4430), 2985 states have internal predecessors, (4430), 734 states have call successors, (734), 234 states have call predecessors, (734), 284 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-12 00:57:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6096 transitions. [2023-11-12 00:57:11,850 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6096 transitions. Word has length 106 [2023-11-12 00:57:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:11,850 INFO L495 AbstractCegarLoop]: Abstraction has 3927 states and 6096 transitions. [2023-11-12 00:57:11,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6096 transitions. [2023-11-12 00:57:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-12 00:57:11,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:11,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:11,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:12,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:57:12,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:12,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1997131097, now seen corresponding path program 1 times [2023-11-12 00:57:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:12,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852767800] [2023-11-12 00:57:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:12,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:12,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852767800] [2023-11-12 00:57:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852767800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:12,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42375945] [2023-11-12 00:57:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:12,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:12,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:12,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:12,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:57:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:12,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:57:12,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:57:12,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42375945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:12,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-12 00:57:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75033534] [2023-11-12 00:57:12,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:12,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:12,813 INFO L87 Difference]: Start difference. First operand 3927 states and 6096 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:13,252 INFO L93 Difference]: Finished difference Result 7869 states and 12344 transitions. [2023-11-12 00:57:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:57:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2023-11-12 00:57:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:13,290 INFO L225 Difference]: With dead ends: 7869 [2023-11-12 00:57:13,291 INFO L226 Difference]: Without dead ends: 3917 [2023-11-12 00:57:13,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:13,310 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:13,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2023-11-12 00:57:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3917. [2023-11-12 00:57:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 2898 states have (on average 1.5148378191856453) internal successors, (4390), 2975 states have internal predecessors, (4390), 734 states have call successors, (734), 234 states have call predecessors, (734), 284 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-12 00:57:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 6056 transitions. [2023-11-12 00:57:13,567 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 6056 transitions. Word has length 107 [2023-11-12 00:57:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 6056 transitions. [2023-11-12 00:57:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 6056 transitions. [2023-11-12 00:57:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 00:57:13,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:13,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:13,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:57:13,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 824965819, now seen corresponding path program 1 times [2023-11-12 00:57:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337408822] [2023-11-12 00:57:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:57:14,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337408822] [2023-11-12 00:57:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337408822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322385896] [2023-11-12 00:57:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:14,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:14,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:14,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:14,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:57:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:14,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:57:14,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:57:14,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322385896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 00:57:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882133458] [2023-11-12 00:57:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:14,560 INFO L87 Difference]: Start difference. First operand 3917 states and 6056 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:57:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:15,844 INFO L93 Difference]: Finished difference Result 10350 states and 16701 transitions. [2023-11-12 00:57:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:57:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 108 [2023-11-12 00:57:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:15,885 INFO L225 Difference]: With dead ends: 10350 [2023-11-12 00:57:15,885 INFO L226 Difference]: Without dead ends: 6448 [2023-11-12 00:57:15,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:57:15,912 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 622 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:15,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1933 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:57:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2023-11-12 00:57:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6330. [2023-11-12 00:57:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 4697 states have (on average 1.4826484990419417) internal successors, (6964), 4807 states have internal predecessors, (6964), 1179 states have call successors, (1179), 380 states have call predecessors, (1179), 453 states have return successors, (1772), 1208 states have call predecessors, (1772), 1159 states have call successors, (1772) [2023-11-12 00:57:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 9915 transitions. [2023-11-12 00:57:16,508 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 9915 transitions. Word has length 108 [2023-11-12 00:57:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:16,509 INFO L495 AbstractCegarLoop]: Abstraction has 6330 states and 9915 transitions. [2023-11-12 00:57:16,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:57:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 9915 transitions. [2023-11-12 00:57:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:57:16,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:16,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:16,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:16,724 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2001192815, now seen corresponding path program 1 times [2023-11-12 00:57:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863335757] [2023-11-12 00:57:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:17,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863335757] [2023-11-12 00:57:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863335757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102334387] [2023-11-12 00:57:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:17,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:17,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:57:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:17,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:57:17,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:57:17,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102334387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:17,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:17,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-12 00:57:17,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206853723] [2023-11-12 00:57:17,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:17,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:57:17,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:57:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:57:17,575 INFO L87 Difference]: Start difference. First operand 6330 states and 9915 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:57:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:18,909 INFO L93 Difference]: Finished difference Result 14273 states and 22728 transitions. [2023-11-12 00:57:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:57:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 110 [2023-11-12 00:57:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:18,961 INFO L225 Difference]: With dead ends: 14273 [2023-11-12 00:57:18,962 INFO L226 Difference]: Without dead ends: 7958 [2023-11-12 00:57:18,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:57:18,992 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 688 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 3198 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:18,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 3198 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:57:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2023-11-12 00:57:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7898. [2023-11-12 00:57:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 5875 states have (on average 1.4665531914893617) internal successors, (8616), 6021 states have internal predecessors, (8616), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 638 states have return successors, (2692), 1398 states have call predecessors, (2692), 1348 states have call successors, (2692) [2023-11-12 00:57:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 12692 transitions. [2023-11-12 00:57:19,906 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 12692 transitions. Word has length 110 [2023-11-12 00:57:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:19,907 INFO L495 AbstractCegarLoop]: Abstraction has 7898 states and 12692 transitions. [2023-11-12 00:57:19,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:57:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 12692 transitions. [2023-11-12 00:57:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 00:57:19,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:19,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:19,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:20,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:20,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:20,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash -849182340, now seen corresponding path program 1 times [2023-11-12 00:57:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:20,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807837761] [2023-11-12 00:57:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:20,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:57:20,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807837761] [2023-11-12 00:57:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807837761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220167323] [2023-11-12 00:57:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:20,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:57:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:20,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:57:20,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:57:20,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:20,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220167323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:20,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:20,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 00:57:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243005579] [2023-11-12 00:57:20,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:20,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:20,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:20,757 INFO L87 Difference]: Start difference. First operand 7898 states and 12692 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:21,400 INFO L93 Difference]: Finished difference Result 16041 states and 26330 transitions. [2023-11-12 00:57:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:57:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 109 [2023-11-12 00:57:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:21,452 INFO L225 Difference]: With dead ends: 16041 [2023-11-12 00:57:21,453 INFO L226 Difference]: Without dead ends: 8166 [2023-11-12 00:57:21,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:21,509 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:21,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2429 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8166 states. [2023-11-12 00:57:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8166 to 8030. [2023-11-12 00:57:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8030 states, 5989 states have (on average 1.457672399398898) internal successors, (8730), 6105 states have internal predecessors, (8730), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 656 states have return successors, (2740), 1446 states have call predecessors, (2740), 1348 states have call successors, (2740) [2023-11-12 00:57:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8030 states to 8030 states and 12854 transitions. [2023-11-12 00:57:22,184 INFO L78 Accepts]: Start accepts. Automaton has 8030 states and 12854 transitions. Word has length 109 [2023-11-12 00:57:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:22,185 INFO L495 AbstractCegarLoop]: Abstraction has 8030 states and 12854 transitions. [2023-11-12 00:57:22,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8030 states and 12854 transitions. [2023-11-12 00:57:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-12 00:57:22,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:22,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:22,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:22,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:22,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:22,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 274873760, now seen corresponding path program 1 times [2023-11-12 00:57:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912515704] [2023-11-12 00:57:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:57:22,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:22,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912515704] [2023-11-12 00:57:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912515704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090665725] [2023-11-12 00:57:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:22,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:22,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:57:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:23,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:57:23,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:57:23,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090665725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-12 00:57:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699533148] [2023-11-12 00:57:23,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:23,148 INFO L87 Difference]: Start difference. First operand 8030 states and 12854 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:24,120 INFO L93 Difference]: Finished difference Result 16466 states and 27101 transitions. [2023-11-12 00:57:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2023-11-12 00:57:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:24,170 INFO L225 Difference]: With dead ends: 16466 [2023-11-12 00:57:24,170 INFO L226 Difference]: Without dead ends: 8460 [2023-11-12 00:57:24,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:24,233 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 19 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:24,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1667 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:57:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8460 states. [2023-11-12 00:57:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8460 to 8364. [2023-11-12 00:57:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 6323 states have (on average 1.4670251462913173) internal successors, (9276), 6439 states have internal predecessors, (9276), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 656 states have return successors, (2740), 1446 states have call predecessors, (2740), 1348 states have call successors, (2740) [2023-11-12 00:57:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 13400 transitions. [2023-11-12 00:57:24,911 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 13400 transitions. Word has length 112 [2023-11-12 00:57:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:24,912 INFO L495 AbstractCegarLoop]: Abstraction has 8364 states and 13400 transitions. [2023-11-12 00:57:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:57:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 13400 transitions. [2023-11-12 00:57:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 00:57:24,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:24,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:24,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:25,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 00:57:25,129 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1286968650, now seen corresponding path program 1 times [2023-11-12 00:57:25,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:25,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843361503] [2023-11-12 00:57:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:57:25,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843361503] [2023-11-12 00:57:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843361503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140591265] [2023-11-12 00:57:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:25,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:25,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:25,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9906c1d-d981-4035-b1f9-7271148d24a1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:57:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:25,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:57:25,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:57:25,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:25,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140591265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:25,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:25,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 00:57:25,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926296994] [2023-11-12 00:57:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:25,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:57:25,985 INFO L87 Difference]: Start difference. First operand 8364 states and 13400 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)