./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:00:43,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:00:43,160 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:00:43,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:00:43,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:00:43,194 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:00:43,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:00:43,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:00:43,197 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:00:43,197 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:00:43,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:00:43,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:00:43,200 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:00:43,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:00:43,201 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:00:43,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:00:43,203 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:00:43,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:00:43,204 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:00:43,205 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:00:43,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:00:43,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:00:43,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:00:43,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:00:43,207 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:00:43,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:00:43,208 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:00:43,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:00:43,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:00:43,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:00:43,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:00:43,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:43,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:00:43,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:00:43,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:00:43,213 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:00:43,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:00:43,213 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:00:43,214 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:00:43,214 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:00:43,214 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:00:43,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:00:43,215 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2023-11-21 21:00:43,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:00:43,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:00:43,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:00:43,542 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:00:43,543 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:00:43,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2023-11-21 21:00:46,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:47,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:47,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2023-11-21 21:00:47,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/data/1b85dcfdf/daa171a1a1504b0ebb4a459d37daf11f/FLAGd160960e0 [2023-11-21 21:00:47,131 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/data/1b85dcfdf/daa171a1a1504b0ebb4a459d37daf11f [2023-11-21 21:00:47,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:47,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:47,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:47,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:47,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:47,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:47" (1/1) ... [2023-11-21 21:00:47,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438267f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:47, skipping insertion in model container [2023-11-21 21:00:47,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:47" (1/1) ... [2023-11-21 21:00:47,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:47,750 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_36df0db5-257f-4e62-9353-482ece7f5a71/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2023-11-21 21:00:47,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:47,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:47,927 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-21 21:00:47,929 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [408] [2023-11-21 21:00:47,929 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [528] [2023-11-21 21:00:47,929 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [620] [2023-11-21 21:00:47,930 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [1287] [2023-11-21 21:00:47,930 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1477] [2023-11-21 21:00:47,931 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1843] [2023-11-21 21:00:47,931 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1878] [2023-11-21 21:00:47,932 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1893] [2023-11-21 21:00:47,933 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1902] [2023-11-21 21:00:48,004 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_36df0db5-257f-4e62-9353-482ece7f5a71/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2023-11-21 21:00:48,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:48,068 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:48,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48 WrapperNode [2023-11-21 21:00:48,069 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:48,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:48,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:48,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:48,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,193 INFO L138 Inliner]: procedures = 86, calls = 334, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 749 [2023-11-21 21:00:48,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:48,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:48,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:48,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:48,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,211 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,239 INFO L187 HeapSplitter]: Split 81 memory accesses to 20 slices as follows [2, 4, 4, 4, 2, 4, 4, 5, 3, 3, 5, 7, 4, 4, 4, 4, 4, 6, 4, 4] [2023-11-21 21:00:48,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,329 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:48,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:48,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:48,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:48,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (1/1) ... [2023-11-21 21:00:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:48,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:48,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:00:48,469 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-21 21:00:48,469 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-21 21:00:48,469 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-21 21:00:48,469 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-21 21:00:48,470 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-21 21:00:48,470 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-21 21:00:48,470 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-21 21:00:48,484 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-21 21:00:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-21 21:00:48,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-21 21:00:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 21:00:48,485 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 21:00:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 21:00:48,486 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 21:00:48,487 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-21 21:00:48,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-21 21:00:48,487 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-21 21:00:48,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-21 21:00:48,488 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-21 21:00:48,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-21 21:00:48,488 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-21 21:00:48,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-21 21:00:48,489 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-21 21:00:48,489 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-21 21:00:48,489 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-21 21:00:48,489 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-21 21:00:48,489 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-21 21:00:48,489 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-21 21:00:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-21 21:00:48,490 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-21 21:00:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-21 21:00:48,490 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-21 21:00:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-21 21:00:48,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-21 21:00:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-21 21:00:48,491 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-21 21:00:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-21 21:00:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-21 21:00:48,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-11-21 21:00:48,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2023-11-21 21:00:48,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2023-11-21 21:00:48,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2023-11-21 21:00:48,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2023-11-21 21:00:48,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2023-11-21 21:00:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2023-11-21 21:00:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2023-11-21 21:00:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-21 21:00:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-21 21:00:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-21 21:00:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-21 21:00:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-21 21:00:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-21 21:00:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-21 21:00:48,498 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-21 21:00:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:48,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-21 21:00:48,498 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-21 21:00:48,780 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:48,787 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:49,983 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:51,185 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:51,186 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 21:00:51,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:51 BoogieIcfgContainer [2023-11-21 21:00:51,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:51,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:51,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:51,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:51,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:47" (1/3) ... [2023-11-21 21:00:51,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6543d84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:51, skipping insertion in model container [2023-11-21 21:00:51,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:48" (2/3) ... [2023-11-21 21:00:51,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6543d84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:51, skipping insertion in model container [2023-11-21 21:00:51,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:51" (3/3) ... [2023-11-21 21:00:51,197 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2023-11-21 21:00:51,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:51,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:00:51,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:51,289 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=PETRI_NET, 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;@1cc863b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:51,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:00:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-21 21:00:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 21:00:51,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:51,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:51,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:51,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash -987056832, now seen corresponding path program 1 times [2023-11-21 21:00:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:51,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023634338] [2023-11-21 21:00:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:52,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:00:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:00:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:00:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 21:00:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 21:00:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-21 21:00:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 21:00:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023634338] [2023-11-21 21:00:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023634338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564438590] [2023-11-21 21:00:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:53,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:53,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:00:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:00:53,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:53,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:53,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564438590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:53,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:00:53,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-11-21 21:00:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343499395] [2023-11-21 21:00:53,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:53,954 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 21:00:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:54,328 INFO L93 Difference]: Finished difference Result 1056 states and 1713 transitions. [2023-11-21 21:00:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:00:54,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2023-11-21 21:00:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:54,350 INFO L225 Difference]: With dead ends: 1056 [2023-11-21 21:00:54,350 INFO L226 Difference]: Without dead ends: 681 [2023-11-21 21:00:54,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:54,363 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 547 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:54,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1049 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-21 21:00:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 669. [2023-11-21 21:00:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 456 states have (on average 1.5921052631578947) internal successors, (726), 487 states have internal predecessors, (726), 172 states have call successors, (172), 41 states have call predecessors, (172), 40 states have return successors, (174), 166 states have call predecessors, (174), 169 states have call successors, (174) [2023-11-21 21:00:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1072 transitions. [2023-11-21 21:00:54,488 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1072 transitions. Word has length 63 [2023-11-21 21:00:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:54,489 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1072 transitions. [2023-11-21 21:00:54,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 21:00:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1072 transitions. [2023-11-21 21:00:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 21:00:54,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:54,498 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:54,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 21:00:54,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:54,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1469299784, now seen corresponding path program 1 times [2023-11-21 21:00:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:54,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518740933] [2023-11-21 21:00:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:00:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:00:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:00:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:00:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:00:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 21:00:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 21:00:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-21 21:00:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:00:55,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518740933] [2023-11-21 21:00:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518740933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:55,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:55,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:55,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151908791] [2023-11-21 21:00:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:55,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:55,737 INFO L87 Difference]: Start difference. First operand 669 states and 1072 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-21 21:01:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:02,927 INFO L93 Difference]: Finished difference Result 1918 states and 3177 transitions. [2023-11-21 21:01:02,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 21:01:02,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2023-11-21 21:01:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:02,952 INFO L225 Difference]: With dead ends: 1918 [2023-11-21 21:01:02,952 INFO L226 Difference]: Without dead ends: 1261 [2023-11-21 21:01:02,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:01:02,960 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1815 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 1149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1149 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:02,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 1144 Invalid, 2794 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1149 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-21 21:01:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2023-11-21 21:01:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 673. [2023-11-21 21:01:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 460 states have (on average 1.5869565217391304) internal successors, (730), 491 states have internal predecessors, (730), 172 states have call successors, (172), 41 states have call predecessors, (172), 40 states have return successors, (174), 166 states have call predecessors, (174), 169 states have call successors, (174) [2023-11-21 21:01:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1076 transitions. [2023-11-21 21:01:03,296 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1076 transitions. Word has length 64 [2023-11-21 21:01:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:03,297 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1076 transitions. [2023-11-21 21:01:03,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-21 21:01:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1076 transitions. [2023-11-21 21:01:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:01:03,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:03,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:01:03,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:03,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1769310191, now seen corresponding path program 1 times [2023-11-21 21:01:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:03,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226716230] [2023-11-21 21:01:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:03,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:01:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:01:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 21:01:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-21 21:01:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-21 21:01:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:01:04,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:04,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226716230] [2023-11-21 21:01:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226716230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529979983] [2023-11-21 21:01:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:04,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:04,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:01:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:04,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 21:01:04,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:01:04,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529979983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:04,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-11-21 21:01:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971889710] [2023-11-21 21:01:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:04,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:01:04,837 INFO L87 Difference]: Start difference. First operand 673 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-21 21:01:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:05,577 INFO L93 Difference]: Finished difference Result 1917 states and 3100 transitions. [2023-11-21 21:01:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2023-11-21 21:01:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:05,589 INFO L225 Difference]: With dead ends: 1917 [2023-11-21 21:01:05,590 INFO L226 Difference]: Without dead ends: 1256 [2023-11-21 21:01:05,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:01:05,601 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 471 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:05,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1074 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:01:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2023-11-21 21:01:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1236. [2023-11-21 21:01:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 841 states have (on average 1.5422116527942924) internal successors, (1297), 901 states have internal predecessors, (1297), 321 states have call successors, (321), 76 states have call predecessors, (321), 73 states have return successors, (340), 308 states have call predecessors, (340), 317 states have call successors, (340) [2023-11-21 21:01:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1958 transitions. [2023-11-21 21:01:06,163 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1958 transitions. Word has length 68 [2023-11-21 21:01:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:06,164 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1958 transitions. [2023-11-21 21:01:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-21 21:01:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1958 transitions. [2023-11-21 21:01:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-21 21:01:06,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:06,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:06,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:06,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 476548221, now seen corresponding path program 1 times [2023-11-21 21:01:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691290418] [2023-11-21 21:01:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:01:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:01:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 21:01:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-21 21:01:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-21 21:01:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 21:01:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:01:07,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691290418] [2023-11-21 21:01:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691290418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442794149] [2023-11-21 21:01:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:07,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:07,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:01:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:07,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:01:07,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:01:07,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442794149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:07,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:07,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-21 21:01:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948548804] [2023-11-21 21:01:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:01:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:01:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:01:07,999 INFO L87 Difference]: Start difference. First operand 1236 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-21 21:01:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:09,138 INFO L93 Difference]: Finished difference Result 2177 states and 3426 transitions. [2023-11-21 21:01:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:09,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-11-21 21:01:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:09,150 INFO L225 Difference]: With dead ends: 2177 [2023-11-21 21:01:09,150 INFO L226 Difference]: Without dead ends: 1394 [2023-11-21 21:01:09,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:01:09,158 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 532 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:09,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1697 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:01:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-11-21 21:01:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1380. [2023-11-21 21:01:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 957 states have (on average 1.5245559038662486) internal successors, (1459), 1019 states have internal predecessors, (1459), 339 states have call successors, (339), 84 states have call predecessors, (339), 83 states have return successors, (360), 326 states have call predecessors, (360), 335 states have call successors, (360) [2023-11-21 21:01:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2158 transitions. [2023-11-21 21:01:09,767 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2158 transitions. Word has length 72 [2023-11-21 21:01:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:09,767 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2158 transitions. [2023-11-21 21:01:09,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-21 21:01:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2158 transitions. [2023-11-21 21:01:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-21 21:01:09,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:09,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:09,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:09,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:09,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:09,995 INFO L85 PathProgramCache]: Analyzing trace with hash -891555137, now seen corresponding path program 1 times [2023-11-21 21:01:09,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:09,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099822463] [2023-11-21 21:01:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:09,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:10,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:10,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:10,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:01:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:01:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 21:01:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-21 21:01:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 21:01:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-21 21:01:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:01:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099822463] [2023-11-21 21:01:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099822463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995519370] [2023-11-21 21:01:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:11,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:11,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:01:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:11,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:01:11,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:01:11,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995519370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:11,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:11,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-21 21:01:11,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011713377] [2023-11-21 21:01:11,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:11,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:01:11,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:01:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:01:11,501 INFO L87 Difference]: Start difference. First operand 1380 states and 2158 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-21 21:01:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:12,245 INFO L93 Difference]: Finished difference Result 2565 states and 4059 transitions. [2023-11-21 21:01:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:01:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-11-21 21:01:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:12,265 INFO L225 Difference]: With dead ends: 2565 [2023-11-21 21:01:12,265 INFO L226 Difference]: Without dead ends: 1380 [2023-11-21 21:01:12,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:01:12,275 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 273 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:12,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1535 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:01:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2023-11-21 21:01:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1380. [2023-11-21 21:01:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 957 states have (on average 1.4869383490073145) internal successors, (1423), 1019 states have internal predecessors, (1423), 339 states have call successors, (339), 84 states have call predecessors, (339), 83 states have return successors, (360), 326 states have call predecessors, (360), 335 states have call successors, (360) [2023-11-21 21:01:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2122 transitions. [2023-11-21 21:01:12,759 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2122 transitions. Word has length 73 [2023-11-21 21:01:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:12,759 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2122 transitions. [2023-11-21 21:01:12,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-21 21:01:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2122 transitions. [2023-11-21 21:01:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-21 21:01:12,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:12,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:12,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:12,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:12,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1251081371, now seen corresponding path program 1 times [2023-11-21 21:01:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:12,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754038695] [2023-11-21 21:01:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:13,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:01:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:01:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 21:01:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-21 21:01:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-21 21:01:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:01:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754038695] [2023-11-21 21:01:14,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754038695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799651574] [2023-11-21 21:01:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:14,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:14,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:01:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:14,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 21:01:14,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:01:14,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:01:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:01:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799651574] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:15,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:01:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2023-11-21 21:01:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939215645] [2023-11-21 21:01:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:15,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:01:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:01:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:01:15,019 INFO L87 Difference]: Start difference. First operand 1380 states and 2122 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-21 21:01:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:18,702 INFO L93 Difference]: Finished difference Result 3283 states and 5183 transitions. [2023-11-21 21:01:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 21:01:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2023-11-21 21:01:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:18,722 INFO L225 Difference]: With dead ends: 3283 [2023-11-21 21:01:18,723 INFO L226 Difference]: Without dead ends: 2501 [2023-11-21 21:01:18,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 21:01:18,731 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 1790 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:18,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1868 Valid, 2794 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-21 21:01:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2023-11-21 21:01:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2419. [2023-11-21 21:01:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 1720 states have (on average 1.4924418604651162) internal successors, (2567), 1815 states have internal predecessors, (2567), 548 states have call successors, (548), 145 states have call predecessors, (548), 150 states have return successors, (656), 530 states have call predecessors, (656), 543 states have call successors, (656) [2023-11-21 21:01:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3771 transitions. [2023-11-21 21:01:19,517 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3771 transitions. Word has length 75 [2023-11-21 21:01:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 3771 transitions. [2023-11-21 21:01:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-21 21:01:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3771 transitions. [2023-11-21 21:01:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-21 21:01:19,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:19,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:19,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:19,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:19,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -345102957, now seen corresponding path program 1 times [2023-11-21 21:01:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753199479] [2023-11-21 21:01:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:19,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 21:01:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 21:01:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 21:01:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-21 21:01:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-21 21:01:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:01:20,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753199479] [2023-11-21 21:01:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753199479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344280376] [2023-11-21 21:01:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:20,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:20,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:20,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:01:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:21,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:21,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:01:21,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344280376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:21,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:21,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-11-21 21:01:21,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777603408] [2023-11-21 21:01:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:01:21,204 INFO L87 Difference]: Start difference. First operand 2419 states and 3771 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-21 21:01:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:22,594 INFO L93 Difference]: Finished difference Result 5980 states and 9479 transitions. [2023-11-21 21:01:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-21 21:01:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:22,631 INFO L225 Difference]: With dead ends: 5980 [2023-11-21 21:01:22,632 INFO L226 Difference]: Without dead ends: 3573 [2023-11-21 21:01:22,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:01:22,652 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 519 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:22,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1230 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:01:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2023-11-21 21:01:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3505. [2023-11-21 21:01:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 2502 states have (on average 1.4900079936051158) internal successors, (3728), 2645 states have internal predecessors, (3728), 784 states have call successors, (784), 207 states have call predecessors, (784), 218 states have return successors, (955), 760 states have call predecessors, (955), 779 states have call successors, (955) [2023-11-21 21:01:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5467 transitions. [2023-11-21 21:01:23,813 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5467 transitions. Word has length 75 [2023-11-21 21:01:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:23,814 INFO L495 AbstractCegarLoop]: Abstraction has 3505 states and 5467 transitions. [2023-11-21 21:01:23,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-21 21:01:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5467 transitions. [2023-11-21 21:01:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-21 21:01:23,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:23,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:23,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:24,033 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:24,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 603597063, now seen corresponding path program 1 times [2023-11-21 21:01:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:24,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722157745] [2023-11-21 21:01:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 21:01:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-21 21:01:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 21:01:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 21:01:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 21:01:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-21 21:01:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:25,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-21 21:01:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:01:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722157745] [2023-11-21 21:01:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722157745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59808366] [2023-11-21 21:01:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:25,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:25,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:25,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 21:01:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:25,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 21:01:25,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:01:25,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59808366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:25,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:25,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-11-21 21:01:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68260371] [2023-11-21 21:01:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:25,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:01:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:01:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:01:25,458 INFO L87 Difference]: Start difference. First operand 3505 states and 5467 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-21 21:01:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:27,135 INFO L93 Difference]: Finished difference Result 6744 states and 10550 transitions. [2023-11-21 21:01:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2023-11-21 21:01:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:27,165 INFO L225 Difference]: With dead ends: 6744 [2023-11-21 21:01:27,165 INFO L226 Difference]: Without dead ends: 3251 [2023-11-21 21:01:27,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-21 21:01:27,191 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 464 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:27,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1645 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:01:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2023-11-21 21:01:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3236. [2023-11-21 21:01:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2317 states have (on average 1.487699611566681) internal successors, (3447), 2446 states have internal predecessors, (3447), 716 states have call successors, (716), 193 states have call predecessors, (716), 202 states have return successors, (871), 692 states have call predecessors, (871), 711 states have call successors, (871) [2023-11-21 21:01:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 5034 transitions. [2023-11-21 21:01:28,379 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 5034 transitions. Word has length 76 [2023-11-21 21:01:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:28,381 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 5034 transitions. [2023-11-21 21:01:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-21 21:01:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 5034 transitions. [2023-11-21 21:01:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-21 21:01:28,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:28,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:28,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:28,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36df0db5-257f-4e62-9353-482ece7f5a71/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:28,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:28,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1614842970, now seen corresponding path program 1 times [2023-11-21 21:01:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:28,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707315158] [2023-11-21 21:01:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:29,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:01:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat