./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB --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 a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:51:05,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:51:05,344 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:51:05,349 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:51:05,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:51:05,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:51:05,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:51:05,391 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:51:05,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:51:05,392 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:51:05,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:51:05,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:51:05,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:51:05,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:51:05,393 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:51:05,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:51:05,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:51:05,394 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:51:05,395 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:05,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:05,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:05,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:05,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:05,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:51:05,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:51:05,397 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:51:05,398 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB 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 -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2024-11-27 19:51:05,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:51:05,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:51:05,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:51:05,757 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:51:05,757 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:51:05,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2024-11-27 19:51:08,893 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/data/7fa92ae94/78c83c70658f44f68de40ad73abb2187/FLAGc92df8f15 [2024-11-27 19:51:09,176 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:51:09,177 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2024-11-27 19:51:09,188 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/data/7fa92ae94/78c83c70658f44f68de40ad73abb2187/FLAGc92df8f15 [2024-11-27 19:51:09,460 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/data/7fa92ae94/78c83c70658f44f68de40ad73abb2187 [2024-11-27 19:51:09,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:51:09,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:51:09,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:09,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:51:09,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:51:09,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464cd3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09, skipping insertion in model container [2024-11-27 19:51:09,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,518 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:51:09,662 WARN L250 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_fe3df3cd-5dee-4938-8e93-bdc18779a451/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2024-11-27 19:51:09,738 WARN L250 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_fe3df3cd-5dee-4938-8e93-bdc18779a451/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2024-11-27 19:51:09,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:09,808 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:51:09,819 WARN L250 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_fe3df3cd-5dee-4938-8e93-bdc18779a451/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2024-11-27 19:51:09,836 WARN L250 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_fe3df3cd-5dee-4938-8e93-bdc18779a451/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2024-11-27 19:51:09,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:09,880 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:51:09,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09 WrapperNode [2024-11-27 19:51:09,880 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:09,881 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:09,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:51:09,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:51:09,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,941 INFO L138 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2024-11-27 19:51:09,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:09,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:51:09,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:51:09,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:51:09,951 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,954 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,968 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 19:51:09,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,976 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,978 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,994 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:09,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:10,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:51:10,004 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:51:10,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:51:10,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:51:10,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (1/1) ... [2024-11-27 19:51:10,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:10,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:51:10,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:51:10,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:51:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-27 19:51:10,078 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-27 19:51:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-27 19:51:10,078 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-27 19:51:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-27 19:51:10,078 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-27 19:51:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-27 19:51:10,078 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-27 19:51:10,078 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-27 19:51:10,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-27 19:51:10,079 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-27 19:51:10,079 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-27 19:51:10,181 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:51:10,183 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:51:10,882 INFO L? ?]: Removed 71 outVars from TransFormulas that were not future-live. [2024-11-27 19:51:10,882 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:51:10,897 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:51:10,898 INFO L312 CfgBuilder]: Removed 18 assume(true) statements. [2024-11-27 19:51:10,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:10 BoogieIcfgContainer [2024-11-27 19:51:10,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:51:10,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:51:10,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:51:10,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:51:10,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:51:09" (1/3) ... [2024-11-27 19:51:10,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd2b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:10, skipping insertion in model container [2024-11-27 19:51:10,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:09" (2/3) ... [2024-11-27 19:51:10,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd2b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:10, skipping insertion in model container [2024-11-27 19:51:10,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:10" (3/3) ... [2024-11-27 19:51:10,909 INFO L128 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2024-11-27 19:51:10,943 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:51:10,945 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c that has 11 procedures, 206 locations, 1 initial locations, 9 loop locations, and 2 error locations. [2024-11-27 19:51:11,018 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:51:11,034 INFO L333 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, 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;@18701a66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:51:11,035 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 19:51:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 171 states have (on average 1.5789473684210527) internal successors, (270), 176 states have internal predecessors, (270), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-27 19:51:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 19:51:11,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:11,053 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:11,053 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:11,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash 956901964, now seen corresponding path program 1 times [2024-11-27 19:51:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883347098] [2024-11-27 19:51:11,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883347098] [2024-11-27 19:51:11,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883347098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:11,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:11,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985232670] [2024-11-27 19:51:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:11,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:11,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:11,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:11,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:11,443 INFO L87 Difference]: Start difference. First operand has 206 states, 171 states have (on average 1.5789473684210527) internal successors, (270), 176 states have internal predecessors, (270), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:11,606 INFO L93 Difference]: Finished difference Result 451 states and 704 transitions. [2024-11-27 19:51:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-27 19:51:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:11,628 INFO L225 Difference]: With dead ends: 451 [2024-11-27 19:51:11,629 INFO L226 Difference]: Without dead ends: 250 [2024-11-27 19:51:11,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:11,643 INFO L435 NwaCegarLoop]: 306 mSDtfsCounter, 274 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:11,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 387 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-27 19:51:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2024-11-27 19:51:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 206 states have (on average 1.4660194174757282) internal successors, (302), 210 states have internal predecessors, (302), 28 states have call successors, (28), 12 states have call predecessors, (28), 10 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2024-11-27 19:51:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 358 transitions. [2024-11-27 19:51:11,753 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 358 transitions. Word has length 41 [2024-11-27 19:51:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:11,753 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 358 transitions. [2024-11-27 19:51:11,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 358 transitions. [2024-11-27 19:51:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-27 19:51:11,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:11,759 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:11,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:51:11,760 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:11,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1977062499, now seen corresponding path program 1 times [2024-11-27 19:51:11,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:11,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008117972] [2024-11-27 19:51:11,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:11,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:11,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008117972] [2024-11-27 19:51:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008117972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:11,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:11,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279598096] [2024-11-27 19:51:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:11,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:11,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:11,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:11,883 INFO L87 Difference]: Start difference. First operand 246 states and 358 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:11,950 INFO L93 Difference]: Finished difference Result 439 states and 631 transitions. [2024-11-27 19:51:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2024-11-27 19:51:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:11,956 INFO L225 Difference]: With dead ends: 439 [2024-11-27 19:51:11,959 INFO L226 Difference]: Without dead ends: 332 [2024-11-27 19:51:11,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:11,963 INFO L435 NwaCegarLoop]: 310 mSDtfsCounter, 66 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:11,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 569 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-27 19:51:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 307. [2024-11-27 19:51:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 261 states have (on average 1.4559386973180077) internal successors, (380), 265 states have internal predecessors, (380), 31 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2024-11-27 19:51:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 443 transitions. [2024-11-27 19:51:12,031 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 443 transitions. Word has length 42 [2024-11-27 19:51:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:12,031 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 443 transitions. [2024-11-27 19:51:12,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 443 transitions. [2024-11-27 19:51:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 19:51:12,033 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:12,034 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:12,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:51:12,037 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:12,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1436664539, now seen corresponding path program 1 times [2024-11-27 19:51:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506747802] [2024-11-27 19:51:12,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:12,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506747802] [2024-11-27 19:51:12,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506747802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:12,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:12,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942350896] [2024-11-27 19:51:12,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:12,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:12,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:12,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:12,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:12,161 INFO L87 Difference]: Start difference. First operand 307 states and 443 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:12,306 INFO L93 Difference]: Finished difference Result 632 states and 903 transitions. [2024-11-27 19:51:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2024-11-27 19:51:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:12,316 INFO L225 Difference]: With dead ends: 632 [2024-11-27 19:51:12,316 INFO L226 Difference]: Without dead ends: 464 [2024-11-27 19:51:12,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:12,320 INFO L435 NwaCegarLoop]: 293 mSDtfsCounter, 261 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:12,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 367 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-11-27 19:51:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 452. [2024-11-27 19:51:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 388 states have (on average 1.4175257731958764) internal successors, (550), 394 states have internal predecessors, (550), 42 states have call successors, (42), 22 states have call predecessors, (42), 20 states have return successors, (48), 36 states have call predecessors, (48), 38 states have call successors, (48) [2024-11-27 19:51:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 640 transitions. [2024-11-27 19:51:12,396 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 640 transitions. Word has length 43 [2024-11-27 19:51:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:12,396 INFO L471 AbstractCegarLoop]: Abstraction has 452 states and 640 transitions. [2024-11-27 19:51:12,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 640 transitions. [2024-11-27 19:51:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 19:51:12,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:12,403 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:12,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:51:12,404 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:12,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1765378598, now seen corresponding path program 1 times [2024-11-27 19:51:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805323058] [2024-11-27 19:51:12,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 19:51:12,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805323058] [2024-11-27 19:51:12,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805323058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:12,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:12,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:12,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943465659] [2024-11-27 19:51:12,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:12,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:12,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:12,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:12,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:12,587 INFO L87 Difference]: Start difference. First operand 452 states and 640 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:51:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:12,688 INFO L93 Difference]: Finished difference Result 923 states and 1296 transitions. [2024-11-27 19:51:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:12,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2024-11-27 19:51:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:12,697 INFO L225 Difference]: With dead ends: 923 [2024-11-27 19:51:12,698 INFO L226 Difference]: Without dead ends: 610 [2024-11-27 19:51:12,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:12,701 INFO L435 NwaCegarLoop]: 339 mSDtfsCounter, 53 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:12,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 613 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2024-11-27 19:51:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2024-11-27 19:51:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 524 states have (on average 1.366412213740458) internal successors, (716), 530 states have internal predecessors, (716), 56 states have call successors, (56), 30 states have call predecessors, (56), 28 states have return successors, (70), 50 states have call predecessors, (70), 52 states have call successors, (70) [2024-11-27 19:51:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 842 transitions. [2024-11-27 19:51:12,786 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 842 transitions. Word has length 58 [2024-11-27 19:51:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:12,786 INFO L471 AbstractCegarLoop]: Abstraction has 610 states and 842 transitions. [2024-11-27 19:51:12,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:51:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 842 transitions. [2024-11-27 19:51:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-27 19:51:12,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:12,793 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:12,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:51:12,793 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:12,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 441049120, now seen corresponding path program 1 times [2024-11-27 19:51:12,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672686035] [2024-11-27 19:51:12,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:51:12,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672686035] [2024-11-27 19:51:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672686035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151531756] [2024-11-27 19:51:12,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:12,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:12,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:12,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:12,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:51:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:13,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:51:13,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:13,195 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151531756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:13,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:13,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376392480] [2024-11-27 19:51:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:13,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:13,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:13,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:13,199 INFO L87 Difference]: Start difference. First operand 610 states and 842 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:51:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:13,299 INFO L93 Difference]: Finished difference Result 1111 states and 1530 transitions. [2024-11-27 19:51:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-11-27 19:51:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:13,308 INFO L225 Difference]: With dead ends: 1111 [2024-11-27 19:51:13,310 INFO L226 Difference]: Without dead ends: 728 [2024-11-27 19:51:13,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:13,313 INFO L435 NwaCegarLoop]: 334 mSDtfsCounter, 67 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:13,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 590 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2024-11-27 19:51:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 688. [2024-11-27 19:51:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 594 states have (on average 1.32996632996633) internal successors, (790), 600 states have internal predecessors, (790), 60 states have call successors, (60), 34 states have call predecessors, (60), 32 states have return successors, (82), 54 states have call predecessors, (82), 56 states have call successors, (82) [2024-11-27 19:51:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 932 transitions. [2024-11-27 19:51:13,407 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 932 transitions. Word has length 63 [2024-11-27 19:51:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:13,411 INFO L471 AbstractCegarLoop]: Abstraction has 688 states and 932 transitions. [2024-11-27 19:51:13,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:51:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 932 transitions. [2024-11-27 19:51:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-27 19:51:13,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:13,419 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:13,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:51:13,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:13,620 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:13,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1673946401, now seen corresponding path program 1 times [2024-11-27 19:51:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609746384] [2024-11-27 19:51:13,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:51:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609746384] [2024-11-27 19:51:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609746384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791760865] [2024-11-27 19:51:13,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:13,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:13,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:13,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:13,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:51:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:13,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:51:13,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:14,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 19:51:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791760865] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:14,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2024-11-27 19:51:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680928536] [2024-11-27 19:51:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:14,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:51:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:14,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:51:14,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:51:14,143 INFO L87 Difference]: Start difference. First operand 688 states and 932 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:51:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:14,338 INFO L93 Difference]: Finished difference Result 738 states and 992 transitions. [2024-11-27 19:51:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:51:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2024-11-27 19:51:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:14,343 INFO L225 Difference]: With dead ends: 738 [2024-11-27 19:51:14,344 INFO L226 Difference]: Without dead ends: 735 [2024-11-27 19:51:14,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:51:14,345 INFO L435 NwaCegarLoop]: 307 mSDtfsCounter, 484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:14,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 368 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:51:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-11-27 19:51:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 687. [2024-11-27 19:51:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 594 states have (on average 1.3265993265993266) internal successors, (788), 599 states have internal predecessors, (788), 59 states have call successors, (59), 34 states have call predecessors, (59), 32 states have return successors, (82), 54 states have call predecessors, (82), 56 states have call successors, (82) [2024-11-27 19:51:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 929 transitions. [2024-11-27 19:51:14,411 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 929 transitions. Word has length 63 [2024-11-27 19:51:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:14,411 INFO L471 AbstractCegarLoop]: Abstraction has 687 states and 929 transitions. [2024-11-27 19:51:14,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:51:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 929 transitions. [2024-11-27 19:51:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 19:51:14,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:14,416 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:14,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:51:14,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 19:51:14,617 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:14,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash -353411329, now seen corresponding path program 1 times [2024-11-27 19:51:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:14,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088612610] [2024-11-27 19:51:14,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:51:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088612610] [2024-11-27 19:51:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088612610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456804586] [2024-11-27 19:51:14,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:14,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:14,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:14,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:51:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:14,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:51:14,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:15,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 19:51:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456804586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:15,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:15,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-11-27 19:51:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557668718] [2024-11-27 19:51:15,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:15,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:51:15,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:15,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:51:15,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:51:15,353 INFO L87 Difference]: Start difference. First operand 687 states and 929 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 19:51:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:15,905 INFO L93 Difference]: Finished difference Result 1834 states and 2477 transitions. [2024-11-27 19:51:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:51:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 64 [2024-11-27 19:51:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:15,914 INFO L225 Difference]: With dead ends: 1834 [2024-11-27 19:51:15,914 INFO L226 Difference]: Without dead ends: 1419 [2024-11-27 19:51:15,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:51:15,917 INFO L435 NwaCegarLoop]: 362 mSDtfsCounter, 451 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:15,918 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 2235 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:51:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2024-11-27 19:51:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1080. [2024-11-27 19:51:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 944 states have (on average 1.2891949152542372) internal successors, (1217), 957 states have internal predecessors, (1217), 82 states have call successors, (82), 51 states have call predecessors, (82), 52 states have return successors, (123), 72 states have call predecessors, (123), 79 states have call successors, (123) [2024-11-27 19:51:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1422 transitions. [2024-11-27 19:51:16,039 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1422 transitions. Word has length 64 [2024-11-27 19:51:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:16,040 INFO L471 AbstractCegarLoop]: Abstraction has 1080 states and 1422 transitions. [2024-11-27 19:51:16,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 19:51:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1422 transitions. [2024-11-27 19:51:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:16,046 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:16,047 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:16,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:51:16,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 19:51:16,248 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:16,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -630937345, now seen corresponding path program 1 times [2024-11-27 19:51:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:16,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065180726] [2024-11-27 19:51:16,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:16,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065180726] [2024-11-27 19:51:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065180726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:16,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:16,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194944118] [2024-11-27 19:51:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:16,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:16,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:16,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:16,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:16,325 INFO L87 Difference]: Start difference. First operand 1080 states and 1422 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:16,406 INFO L93 Difference]: Finished difference Result 1205 states and 1607 transitions. [2024-11-27 19:51:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:16,414 INFO L225 Difference]: With dead ends: 1205 [2024-11-27 19:51:16,414 INFO L226 Difference]: Without dead ends: 1080 [2024-11-27 19:51:16,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:16,417 INFO L435 NwaCegarLoop]: 280 mSDtfsCounter, 188 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:16,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 367 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2024-11-27 19:51:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2024-11-27 19:51:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 944 states have (on average 1.2881355932203389) internal successors, (1216), 957 states have internal predecessors, (1216), 82 states have call successors, (82), 51 states have call predecessors, (82), 52 states have return successors, (123), 72 states have call predecessors, (123), 79 states have call successors, (123) [2024-11-27 19:51:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1421 transitions. [2024-11-27 19:51:16,539 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1421 transitions. Word has length 67 [2024-11-27 19:51:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:16,539 INFO L471 AbstractCegarLoop]: Abstraction has 1080 states and 1421 transitions. [2024-11-27 19:51:16,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1421 transitions. [2024-11-27 19:51:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:16,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:16,543 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:16,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 19:51:16,544 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:16,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1064666431, now seen corresponding path program 1 times [2024-11-27 19:51:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:16,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519584551] [2024-11-27 19:51:16,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519584551] [2024-11-27 19:51:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519584551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:51:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104566608] [2024-11-27 19:51:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:16,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:51:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:16,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:51:16,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:51:16,695 INFO L87 Difference]: Start difference. First operand 1080 states and 1421 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:17,303 INFO L93 Difference]: Finished difference Result 1332 states and 1799 transitions. [2024-11-27 19:51:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:17,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:17,313 INFO L225 Difference]: With dead ends: 1332 [2024-11-27 19:51:17,313 INFO L226 Difference]: Without dead ends: 1210 [2024-11-27 19:51:17,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:17,316 INFO L435 NwaCegarLoop]: 204 mSDtfsCounter, 424 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:17,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 663 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:51:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2024-11-27 19:51:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1199. [2024-11-27 19:51:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1045 states have (on average 1.3110047846889952) internal successors, (1370), 1059 states have internal predecessors, (1370), 93 states have call successors, (93), 57 states have call predecessors, (93), 59 states have return successors, (135), 83 states have call predecessors, (135), 90 states have call successors, (135) [2024-11-27 19:51:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1598 transitions. [2024-11-27 19:51:17,431 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1598 transitions. Word has length 67 [2024-11-27 19:51:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:17,431 INFO L471 AbstractCegarLoop]: Abstraction has 1199 states and 1598 transitions. [2024-11-27 19:51:17,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1598 transitions. [2024-11-27 19:51:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:17,435 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:17,435 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:17,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 19:51:17,435 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:17,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -322660931, now seen corresponding path program 1 times [2024-11-27 19:51:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915077106] [2024-11-27 19:51:17,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915077106] [2024-11-27 19:51:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915077106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:17,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:17,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067360166] [2024-11-27 19:51:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:17,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:17,594 INFO L87 Difference]: Start difference. First operand 1199 states and 1598 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:18,371 INFO L93 Difference]: Finished difference Result 1587 states and 2178 transitions. [2024-11-27 19:51:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:18,380 INFO L225 Difference]: With dead ends: 1587 [2024-11-27 19:51:18,380 INFO L226 Difference]: Without dead ends: 1346 [2024-11-27 19:51:18,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:18,382 INFO L435 NwaCegarLoop]: 300 mSDtfsCounter, 413 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:18,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1148 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:51:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2024-11-27 19:51:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1311. [2024-11-27 19:51:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1139 states have (on average 1.3257243195785777) internal successors, (1510), 1154 states have internal predecessors, (1510), 104 states have call successors, (104), 63 states have call predecessors, (104), 66 states have return successors, (149), 95 states have call predecessors, (149), 101 states have call successors, (149) [2024-11-27 19:51:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1763 transitions. [2024-11-27 19:51:18,484 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1763 transitions. Word has length 67 [2024-11-27 19:51:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:18,484 INFO L471 AbstractCegarLoop]: Abstraction has 1311 states and 1763 transitions. [2024-11-27 19:51:18,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1763 transitions. [2024-11-27 19:51:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:18,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:18,488 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:18,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 19:51:18,489 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:18,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 121239743, now seen corresponding path program 1 times [2024-11-27 19:51:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417726624] [2024-11-27 19:51:18,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417726624] [2024-11-27 19:51:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417726624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:18,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644627036] [2024-11-27 19:51:18,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:18,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:18,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:18,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:18,643 INFO L87 Difference]: Start difference. First operand 1311 states and 1763 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:19,442 INFO L93 Difference]: Finished difference Result 1933 states and 2692 transitions. [2024-11-27 19:51:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:19,453 INFO L225 Difference]: With dead ends: 1933 [2024-11-27 19:51:19,454 INFO L226 Difference]: Without dead ends: 1580 [2024-11-27 19:51:19,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:19,457 INFO L435 NwaCegarLoop]: 206 mSDtfsCounter, 421 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:19,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 843 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:51:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2024-11-27 19:51:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1544. [2024-11-27 19:51:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1334 states have (on average 1.3500749625187407) internal successors, (1801), 1353 states have internal predecessors, (1801), 126 states have call successors, (126), 75 states have call predecessors, (126), 82 states have return successors, (183), 119 states have call predecessors, (183), 123 states have call successors, (183) [2024-11-27 19:51:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2110 transitions. [2024-11-27 19:51:19,659 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2110 transitions. Word has length 67 [2024-11-27 19:51:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:19,660 INFO L471 AbstractCegarLoop]: Abstraction has 1544 states and 2110 transitions. [2024-11-27 19:51:19,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2110 transitions. [2024-11-27 19:51:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:19,665 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:19,665 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:19,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 19:51:19,667 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:19,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1659579773, now seen corresponding path program 1 times [2024-11-27 19:51:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671320155] [2024-11-27 19:51:19,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671320155] [2024-11-27 19:51:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671320155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:19,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:19,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131095124] [2024-11-27 19:51:19,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:19,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:19,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:19,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:19,845 INFO L87 Difference]: Start difference. First operand 1544 states and 2110 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:20,785 INFO L93 Difference]: Finished difference Result 2732 states and 3894 transitions. [2024-11-27 19:51:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:20,797 INFO L225 Difference]: With dead ends: 2732 [2024-11-27 19:51:20,798 INFO L226 Difference]: Without dead ends: 2146 [2024-11-27 19:51:20,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:20,801 INFO L435 NwaCegarLoop]: 291 mSDtfsCounter, 477 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:20,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1107 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 19:51:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2024-11-27 19:51:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2019. [2024-11-27 19:51:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1731 states have (on average 1.3847487001733103) internal successors, (2397), 1764 states have internal predecessors, (2397), 166 states have call successors, (166), 99 states have call predecessors, (166), 120 states have return successors, (271), 163 states have call predecessors, (271), 163 states have call successors, (271) [2024-11-27 19:51:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2834 transitions. [2024-11-27 19:51:21,036 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2834 transitions. Word has length 67 [2024-11-27 19:51:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:21,036 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 2834 transitions. [2024-11-27 19:51:21,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2834 transitions. [2024-11-27 19:51:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:21,042 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:21,042 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:21,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 19:51:21,042 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:21,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -369006337, now seen corresponding path program 1 times [2024-11-27 19:51:21,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:21,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955655821] [2024-11-27 19:51:21,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:21,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:21,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955655821] [2024-11-27 19:51:21,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955655821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:21,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:21,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431401544] [2024-11-27 19:51:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:21,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:21,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:21,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:21,187 INFO L87 Difference]: Start difference. First operand 2019 states and 2834 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:22,285 INFO L93 Difference]: Finished difference Result 4219 states and 6220 transitions. [2024-11-27 19:51:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:22,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:22,307 INFO L225 Difference]: With dead ends: 4219 [2024-11-27 19:51:22,308 INFO L226 Difference]: Without dead ends: 3158 [2024-11-27 19:51:22,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:22,313 INFO L435 NwaCegarLoop]: 287 mSDtfsCounter, 410 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:22,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1091 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 19:51:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2024-11-27 19:51:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 2930. [2024-11-27 19:51:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2930 states, 2472 states have (on average 1.4065533980582525) internal successors, (3477), 2551 states have internal predecessors, (3477), 242 states have call successors, (242), 147 states have call predecessors, (242), 214 states have return successors, (539), 247 states have call predecessors, (539), 239 states have call successors, (539) [2024-11-27 19:51:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4258 transitions. [2024-11-27 19:51:22,636 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4258 transitions. Word has length 67 [2024-11-27 19:51:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:22,636 INFO L471 AbstractCegarLoop]: Abstraction has 2930 states and 4258 transitions. [2024-11-27 19:51:22,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4258 transitions. [2024-11-27 19:51:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:22,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:22,641 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:22,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 19:51:22,642 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:22,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash -850086595, now seen corresponding path program 1 times [2024-11-27 19:51:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367238373] [2024-11-27 19:51:22,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367238373] [2024-11-27 19:51:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367238373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:22,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:22,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587659573] [2024-11-27 19:51:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:22,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:22,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:22,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:22,769 INFO L87 Difference]: Start difference. First operand 2930 states and 4258 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:23,803 INFO L93 Difference]: Finished difference Result 7010 states and 10830 transitions. [2024-11-27 19:51:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:23,828 INFO L225 Difference]: With dead ends: 7010 [2024-11-27 19:51:23,829 INFO L226 Difference]: Without dead ends: 5038 [2024-11-27 19:51:23,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:23,835 INFO L435 NwaCegarLoop]: 283 mSDtfsCounter, 407 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:23,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1083 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:51:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2024-11-27 19:51:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 4869. [2024-11-27 19:51:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4033 states have (on average 1.4244978923878007) internal successors, (5745), 4258 states have internal predecessors, (5745), 382 states have call successors, (382), 239 states have call predecessors, (382), 452 states have return successors, (1447), 403 states have call predecessors, (1447), 379 states have call successors, (1447) [2024-11-27 19:51:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 7574 transitions. [2024-11-27 19:51:24,427 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 7574 transitions. Word has length 67 [2024-11-27 19:51:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:24,427 INFO L471 AbstractCegarLoop]: Abstraction has 4869 states and 7574 transitions. [2024-11-27 19:51:24,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 7574 transitions. [2024-11-27 19:51:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:51:24,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:24,434 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:24,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 19:51:24,434 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:24,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash -865605313, now seen corresponding path program 1 times [2024-11-27 19:51:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418866122] [2024-11-27 19:51:24,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:24,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:24,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418866122] [2024-11-27 19:51:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418866122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:24,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:24,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:51:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036288995] [2024-11-27 19:51:24,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:24,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:51:24,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:24,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:51:24,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:51:24,517 INFO L87 Difference]: Start difference. First operand 4869 states and 7574 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:25,699 INFO L93 Difference]: Finished difference Result 10854 states and 17255 transitions. [2024-11-27 19:51:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:51:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-27 19:51:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:25,765 INFO L225 Difference]: With dead ends: 10854 [2024-11-27 19:51:25,765 INFO L226 Difference]: Without dead ends: 6944 [2024-11-27 19:51:25,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:51:25,788 INFO L435 NwaCegarLoop]: 427 mSDtfsCounter, 405 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:25,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 784 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:51:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6944 states. [2024-11-27 19:51:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6944 to 6711. [2024-11-27 19:51:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6711 states, 5535 states have (on average 1.4211382113821138) internal successors, (7866), 5843 states have internal predecessors, (7866), 554 states have call successors, (554), 341 states have call predecessors, (554), 620 states have return successors, (1860), 558 states have call predecessors, (1860), 551 states have call successors, (1860) [2024-11-27 19:51:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6711 states to 6711 states and 10280 transitions. [2024-11-27 19:51:26,761 INFO L78 Accepts]: Start accepts. Automaton has 6711 states and 10280 transitions. Word has length 67 [2024-11-27 19:51:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:26,761 INFO L471 AbstractCegarLoop]: Abstraction has 6711 states and 10280 transitions. [2024-11-27 19:51:26,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 19:51:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6711 states and 10280 transitions. [2024-11-27 19:51:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-27 19:51:26,773 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:26,773 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:26,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 19:51:26,773 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:26,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 789801622, now seen corresponding path program 1 times [2024-11-27 19:51:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513444008] [2024-11-27 19:51:26,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:26,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 19:51:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513444008] [2024-11-27 19:51:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513444008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114323795] [2024-11-27 19:51:26,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:26,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:26,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:26,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:51:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:27,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:51:27,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 19:51:27,049 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114323795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:27,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:27,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719222884] [2024-11-27 19:51:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:27,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:27,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:27,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:27,051 INFO L87 Difference]: Start difference. First operand 6711 states and 10280 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:51:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:27,728 INFO L93 Difference]: Finished difference Result 7284 states and 11017 transitions. [2024-11-27 19:51:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 82 [2024-11-27 19:51:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:27,796 INFO L225 Difference]: With dead ends: 7284 [2024-11-27 19:51:27,796 INFO L226 Difference]: Without dead ends: 6639 [2024-11-27 19:51:27,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:27,804 INFO L435 NwaCegarLoop]: 306 mSDtfsCounter, 242 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:27,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 376 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2024-11-27 19:51:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6631. [2024-11-27 19:51:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6631 states, 5463 states have (on average 1.4208310452132529) internal successors, (7762), 5773 states have internal predecessors, (7762), 550 states have call successors, (550), 337 states have call predecessors, (550), 616 states have return successors, (1848), 552 states have call predecessors, (1848), 547 states have call successors, (1848) [2024-11-27 19:51:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6631 states to 6631 states and 10160 transitions. [2024-11-27 19:51:29,052 INFO L78 Accepts]: Start accepts. Automaton has 6631 states and 10160 transitions. Word has length 82 [2024-11-27 19:51:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:29,052 INFO L471 AbstractCegarLoop]: Abstraction has 6631 states and 10160 transitions. [2024-11-27 19:51:29,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:51:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6631 states and 10160 transitions. [2024-11-27 19:51:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-27 19:51:29,067 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:29,067 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:29,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:29,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 19:51:29,272 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:29,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash -339504041, now seen corresponding path program 1 times [2024-11-27 19:51:29,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:29,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848514009] [2024-11-27 19:51:29,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:29,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 19:51:29,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848514009] [2024-11-27 19:51:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848514009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99846369] [2024-11-27 19:51:29,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:29,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:29,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:29,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:51:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:29,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 19:51:29,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 19:51:29,597 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99846369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:29,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:29,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066436568] [2024-11-27 19:51:29,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:29,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:29,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:29,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:29,598 INFO L87 Difference]: Start difference. First operand 6631 states and 10160 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:51:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:30,330 INFO L93 Difference]: Finished difference Result 7042 states and 10681 transitions. [2024-11-27 19:51:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 96 [2024-11-27 19:51:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:30,366 INFO L225 Difference]: With dead ends: 7042 [2024-11-27 19:51:30,367 INFO L226 Difference]: Without dead ends: 5764 [2024-11-27 19:51:30,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:30,373 INFO L435 NwaCegarLoop]: 328 mSDtfsCounter, 59 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:30,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 586 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2024-11-27 19:51:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 5764. [2024-11-27 19:51:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 4699 states have (on average 1.449457331347095) internal successors, (6811), 4996 states have internal predecessors, (6811), 490 states have call successors, (490), 297 states have call predecessors, (490), 574 states have return successors, (1753), 502 states have call predecessors, (1753), 488 states have call successors, (1753) [2024-11-27 19:51:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 9054 transitions. [2024-11-27 19:51:31,121 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 9054 transitions. Word has length 96 [2024-11-27 19:51:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:31,121 INFO L471 AbstractCegarLoop]: Abstraction has 5764 states and 9054 transitions. [2024-11-27 19:51:31,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:51:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 9054 transitions. [2024-11-27 19:51:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-27 19:51:31,144 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:31,145 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:31,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:31,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 19:51:31,346 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:31,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1480931203, now seen corresponding path program 1 times [2024-11-27 19:51:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:31,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400024285] [2024-11-27 19:51:31,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 19:51:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400024285] [2024-11-27 19:51:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400024285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245657285] [2024-11-27 19:51:31,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:31,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:31,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:51:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:31,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 19:51:31,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 19:51:31,706 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245657285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:31,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-27 19:51:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053597339] [2024-11-27 19:51:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:31,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:31,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:31,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:31,708 INFO L87 Difference]: Start difference. First operand 5764 states and 9054 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-27 19:51:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:33,008 INFO L93 Difference]: Finished difference Result 17077 states and 26984 transitions. [2024-11-27 19:51:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2024-11-27 19:51:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:33,070 INFO L225 Difference]: With dead ends: 17077 [2024-11-27 19:51:33,070 INFO L226 Difference]: Without dead ends: 11325 [2024-11-27 19:51:33,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:33,091 INFO L435 NwaCegarLoop]: 191 mSDtfsCounter, 150 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:33,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 360 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2024-11-27 19:51:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11271. [2024-11-27 19:51:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11271 states, 9182 states have (on average 1.4434763668046178) internal successors, (13254), 9774 states have internal predecessors, (13254), 944 states have call successors, (944), 589 states have call predecessors, (944), 1144 states have return successors, (3441), 939 states have call predecessors, (3441), 942 states have call successors, (3441) [2024-11-27 19:51:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 17639 transitions. [2024-11-27 19:51:34,819 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 17639 transitions. Word has length 108 [2024-11-27 19:51:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:34,819 INFO L471 AbstractCegarLoop]: Abstraction has 11271 states and 17639 transitions. [2024-11-27 19:51:34,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-27 19:51:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 17639 transitions. [2024-11-27 19:51:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-27 19:51:34,859 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:34,860 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:34,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:51:35,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 19:51:35,061 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:35,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1653722747, now seen corresponding path program 1 times [2024-11-27 19:51:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826753998] [2024-11-27 19:51:35,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 19:51:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826753998] [2024-11-27 19:51:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826753998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372917391] [2024-11-27 19:51:35,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:35,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:35,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:35,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:51:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:35,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 19:51:35,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 19:51:35,416 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:35,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372917391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:35,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760274815] [2024-11-27 19:51:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:35,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:35,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:35,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:35,420 INFO L87 Difference]: Start difference. First operand 11271 states and 17639 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-27 19:51:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:37,653 INFO L93 Difference]: Finished difference Result 33007 states and 52180 transitions. [2024-11-27 19:51:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2024-11-27 19:51:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:37,792 INFO L225 Difference]: With dead ends: 33007 [2024-11-27 19:51:37,792 INFO L226 Difference]: Without dead ends: 21749 [2024-11-27 19:51:37,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:37,832 INFO L435 NwaCegarLoop]: 349 mSDtfsCounter, 152 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:37,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 539 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21749 states. [2024-11-27 19:51:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21749 to 21749. [2024-11-27 19:51:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21749 states, 17691 states have (on average 1.4279577186139845) internal successors, (25262), 18840 states have internal predecessors, (25262), 1793 states have call successors, (1793), 1153 states have call predecessors, (1793), 2264 states have return successors, (7036), 1819 states have call predecessors, (7036), 1791 states have call successors, (7036) [2024-11-27 19:51:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21749 states to 21749 states and 34091 transitions. [2024-11-27 19:51:40,357 INFO L78 Accepts]: Start accepts. Automaton has 21749 states and 34091 transitions. Word has length 108 [2024-11-27 19:51:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:40,358 INFO L471 AbstractCegarLoop]: Abstraction has 21749 states and 34091 transitions. [2024-11-27 19:51:40,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-27 19:51:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21749 states and 34091 transitions. [2024-11-27 19:51:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-27 19:51:40,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:40,429 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:40,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:51:40,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:40,635 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:40,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -339418550, now seen corresponding path program 1 times [2024-11-27 19:51:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:40,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492752390] [2024-11-27 19:51:40,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-27 19:51:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492752390] [2024-11-27 19:51:40,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492752390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883969959] [2024-11-27 19:51:40,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:40,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:40,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:40,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:51:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:40,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 19:51:40,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 19:51:41,136 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883969959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:41,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-27 19:51:41,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588632884] [2024-11-27 19:51:41,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:41,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:41,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:41,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:41,139 INFO L87 Difference]: Start difference. First operand 21749 states and 34091 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-27 19:51:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:45,329 INFO L93 Difference]: Finished difference Result 64349 states and 101488 transitions. [2024-11-27 19:51:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 140 [2024-11-27 19:51:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:45,574 INFO L225 Difference]: With dead ends: 64349 [2024-11-27 19:51:45,575 INFO L226 Difference]: Without dead ends: 42617 [2024-11-27 19:51:45,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:45,642 INFO L435 NwaCegarLoop]: 210 mSDtfsCounter, 110 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:45,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 379 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42617 states. [2024-11-27 19:51:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42617 to 42413. [2024-11-27 19:51:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42413 states, 34511 states have (on average 1.4212859667931963) internal successors, (49050), 36806 states have internal predecessors, (49050), 3423 states have call successors, (3423), 2255 states have call predecessors, (3423), 4478 states have return successors, (13758), 3415 states have call predecessors, (13758), 3421 states have call successors, (13758) [2024-11-27 19:51:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42413 states to 42413 states and 66231 transitions. [2024-11-27 19:51:50,095 INFO L78 Accepts]: Start accepts. Automaton has 42413 states and 66231 transitions. Word has length 140 [2024-11-27 19:51:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:50,097 INFO L471 AbstractCegarLoop]: Abstraction has 42413 states and 66231 transitions. [2024-11-27 19:51:50,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-27 19:51:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42413 states and 66231 transitions. [2024-11-27 19:51:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-27 19:51:50,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:50,268 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:50,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:51:50,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:50,474 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:50,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1426897541, now seen corresponding path program 1 times [2024-11-27 19:51:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:50,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069860826] [2024-11-27 19:51:50,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-27 19:51:50,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:50,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069860826] [2024-11-27 19:51:50,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069860826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348928266] [2024-11-27 19:51:50,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:50,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:50,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:50,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:50,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:51:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:50,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 19:51:50,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 19:51:50,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348928266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:50,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684498282] [2024-11-27 19:51:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:50,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:50,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:50,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:50,988 INFO L87 Difference]: Start difference. First operand 42413 states and 66231 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-27 19:51:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:54,382 INFO L93 Difference]: Finished difference Result 63905 states and 99519 transitions. [2024-11-27 19:51:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2024-11-27 19:51:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:54,571 INFO L225 Difference]: With dead ends: 63905 [2024-11-27 19:51:54,571 INFO L226 Difference]: Without dead ends: 33871 [2024-11-27 19:51:54,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:54,656 INFO L435 NwaCegarLoop]: 188 mSDtfsCounter, 129 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:54,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 222 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33871 states. [2024-11-27 19:51:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33871 to 24087. [2024-11-27 19:51:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24087 states, 20001 states have (on average 1.3695315234238288) internal successors, (27392), 20730 states have internal predecessors, (27392), 1995 states have call successors, (1995), 1403 states have call predecessors, (1995), 2090 states have return successors, (4688), 1985 states have call predecessors, (4688), 1993 states have call successors, (4688) [2024-11-27 19:51:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24087 states to 24087 states and 34075 transitions. [2024-11-27 19:51:57,326 INFO L78 Accepts]: Start accepts. Automaton has 24087 states and 34075 transitions. Word has length 156 [2024-11-27 19:51:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:57,326 INFO L471 AbstractCegarLoop]: Abstraction has 24087 states and 34075 transitions. [2024-11-27 19:51:57,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-27 19:51:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 24087 states and 34075 transitions. [2024-11-27 19:51:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-27 19:51:57,375 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:57,375 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:57,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 19:51:57,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 19:51:57,579 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:57,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1189627900, now seen corresponding path program 1 times [2024-11-27 19:51:57,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:57,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334116355] [2024-11-27 19:51:57,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:57,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-27 19:51:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334116355] [2024-11-27 19:51:57,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334116355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434574876] [2024-11-27 19:51:57,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:57,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:57,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3df3cd-5dee-4938-8e93-bdc18779a451/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:51:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:57,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:51:57,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 19:51:57,934 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434574876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:57,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:57,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-27 19:51:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230734265] [2024-11-27 19:51:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:57,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:57,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:57,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:57,936 INFO L87 Difference]: Start difference. First operand 24087 states and 34075 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)