./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya --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 bd466f23ab481babcc03c4173983e1af9100c535496f2e2f8c8fc18a8aaf4174 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:00,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:00,175 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:21:00,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:00,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:00,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:00,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:00,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:00,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:00,210 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:00,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:00,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:00,212 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:00,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:00,213 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:00,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:00,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:00,215 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:00,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:21:00,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:00,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:00,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:00,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:00,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:00,218 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:00,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:00,219 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:00,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:00,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:00,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:00,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:00,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:00,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:00,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:00,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:00,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:21:00,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:21:00,223 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:00,223 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:00,223 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:00,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:00,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:00,224 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd466f23ab481babcc03c4173983e1af9100c535496f2e2f8c8fc18a8aaf4174 [2023-11-28 20:21:00,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:00,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:00,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:00,453 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:00,453 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:00,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c [2023-11-28 20:21:03,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:03,433 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:03,433 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c [2023-11-28 20:21:03,449 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/data/dac053af2/6525c680570843fe8309e566470316cc/FLAG9935ec017 [2023-11-28 20:21:03,460 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/data/dac053af2/6525c680570843fe8309e566470316cc [2023-11-28 20:21:03,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:03,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:03,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:03,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:03,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:03,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61411b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03, skipping insertion in model container [2023-11-28 20:21:03,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,528 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:03,662 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[911,924] [2023-11-28 20:21:03,719 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[8416,8429] [2023-11-28 20:21:03,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:03,785 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:03,812 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[911,924] [2023-11-28 20:21:03,838 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[8416,8429] [2023-11-28 20:21:03,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:03,896 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:03,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03 WrapperNode [2023-11-28 20:21:03,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:03,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:03,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:03,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:03,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,958 INFO L138 Inliner]: procedures = 63, calls = 74, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 634 [2023-11-28 20:21:03,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:03,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:03,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:03,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:03,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,977 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,996 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]. [2023-11-28 20:21:03,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:03,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:04,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:04,035 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:04,035 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:04,036 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (1/1) ... [2023-11-28 20:21:04,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:04,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:04,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:04,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:04,120 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-28 20:21:04,120 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-28 20:21:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-28 20:21:04,121 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-28 20:21:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-28 20:21:04,121 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-28 20:21:04,121 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-28 20:21:04,122 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-28 20:21:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-28 20:21:04,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-28 20:21:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-28 20:21:04,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-28 20:21:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-28 20:21:04,123 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-28 20:21:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-28 20:21:04,123 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-28 20:21:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-28 20:21:04,124 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-28 20:21:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-28 20:21:04,124 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-28 20:21:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-28 20:21:04,124 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-28 20:21:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-28 20:21:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-28 20:21:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-28 20:21:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-28 20:21:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-28 20:21:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-28 20:21:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-28 20:21:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-28 20:21:04,242 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:04,245 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:04,765 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-28 20:21:04,765 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-28 20:21:04,820 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:04,879 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:04,879 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-28 20:21:04,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:04 BoogieIcfgContainer [2023-11-28 20:21:04,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:04,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:04,882 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:04,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:04,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:03" (1/3) ... [2023-11-28 20:21:04,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212b8085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:04, skipping insertion in model container [2023-11-28 20:21:04,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:03" (2/3) ... [2023-11-28 20:21:04,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212b8085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:04, skipping insertion in model container [2023-11-28 20:21:04,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:04" (3/3) ... [2023-11-28 20:21:04,887 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.04.cil-2.c [2023-11-28 20:21:04,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:04,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-28 20:21:04,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:04,960 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51eeb03a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:04,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-28 20:21:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 222 states have (on average 1.6756756756756757) internal successors, (372), 230 states have internal predecessors, (372), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-28 20:21:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-28 20:21:04,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:04,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:04,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:04,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -472300061, now seen corresponding path program 1 times [2023-11-28 20:21:04,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:04,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902338422] [2023-11-28 20:21:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:04,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-28 20:21:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 20:21:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-28 20:21:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-28 20:21:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902338422] [2023-11-28 20:21:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902338422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:05,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 20:21:05,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639596748] [2023-11-28 20:21:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:21:05,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:21:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:05,542 INFO L87 Difference]: Start difference. First operand has 276 states, 222 states have (on average 1.6756756756756757) internal successors, (372), 230 states have internal predecessors, (372), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-28 20:21:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:07,020 INFO L93 Difference]: Finished difference Result 705 states and 1136 transitions. [2023-11-28 20:21:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:21:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2023-11-28 20:21:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:07,054 INFO L225 Difference]: With dead ends: 705 [2023-11-28 20:21:07,054 INFO L226 Difference]: Without dead ends: 441 [2023-11-28 20:21:07,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:07,064 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1008 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:07,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 1194 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-28 20:21:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 375. [2023-11-28 20:21:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 301 states have (on average 1.548172757475083) internal successors, (466), 309 states have internal predecessors, (466), 49 states have call successors, (49), 22 states have call predecessors, (49), 23 states have return successors, (56), 46 states have call predecessors, (56), 45 states have call successors, (56) [2023-11-28 20:21:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 571 transitions. [2023-11-28 20:21:07,164 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 571 transitions. Word has length 57 [2023-11-28 20:21:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:07,164 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 571 transitions. [2023-11-28 20:21:07,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-28 20:21:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 571 transitions. [2023-11-28 20:21:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-28 20:21:07,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:07,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:21:07,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:07,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:07,171 INFO L85 PathProgramCache]: Analyzing trace with hash 421186277, now seen corresponding path program 1 times [2023-11-28 20:21:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:07,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317400212] [2023-11-28 20:21:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-28 20:21:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-28 20:21:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-28 20:21:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-28 20:21:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317400212] [2023-11-28 20:21:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317400212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:07,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:07,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226917095] [2023-11-28 20:21:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:07,331 INFO L87 Difference]: Start difference. First operand 375 states and 571 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:08,389 INFO L93 Difference]: Finished difference Result 775 states and 1157 transitions. [2023-11-28 20:21:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:21:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2023-11-28 20:21:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:08,397 INFO L225 Difference]: With dead ends: 775 [2023-11-28 20:21:08,397 INFO L226 Difference]: Without dead ends: 583 [2023-11-28 20:21:08,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:21:08,401 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 880 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:08,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1061 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:21:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-28 20:21:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 545. [2023-11-28 20:21:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 434 states have (on average 1.5138248847926268) internal successors, (657), 445 states have internal predecessors, (657), 69 states have call successors, (69), 36 states have call predecessors, (69), 40 states have return successors, (82), 66 states have call predecessors, (82), 65 states have call successors, (82) [2023-11-28 20:21:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 808 transitions. [2023-11-28 20:21:08,465 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 808 transitions. Word has length 57 [2023-11-28 20:21:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:08,465 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 808 transitions. [2023-11-28 20:21:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 808 transitions. [2023-11-28 20:21:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 20:21:08,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:08,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:08,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:21:08,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:08,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1520257116, now seen corresponding path program 1 times [2023-11-28 20:21:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:08,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803825775] [2023-11-28 20:21:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-28 20:21:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-28 20:21:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-28 20:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:08,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803825775] [2023-11-28 20:21:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803825775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 20:21:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986404522] [2023-11-28 20:21:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:21:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:21:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:21:08,667 INFO L87 Difference]: Start difference. First operand 545 states and 808 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-28 20:21:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:09,730 INFO L93 Difference]: Finished difference Result 945 states and 1389 transitions. [2023-11-28 20:21:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:21:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-11-28 20:21:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:09,737 INFO L225 Difference]: With dead ends: 945 [2023-11-28 20:21:09,737 INFO L226 Difference]: Without dead ends: 583 [2023-11-28 20:21:09,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:09,741 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 329 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:09,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1508 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:21:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-28 20:21:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 553. [2023-11-28 20:21:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 440 states have (on average 1.5022727272727272) internal successors, (661), 451 states have internal predecessors, (661), 69 states have call successors, (69), 36 states have call predecessors, (69), 42 states have return successors, (84), 68 states have call predecessors, (84), 65 states have call successors, (84) [2023-11-28 20:21:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 814 transitions. [2023-11-28 20:21:09,788 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 814 transitions. Word has length 58 [2023-11-28 20:21:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:09,789 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 814 transitions. [2023-11-28 20:21:09,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-28 20:21:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 814 transitions. [2023-11-28 20:21:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 20:21:09,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:09,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:21:09,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:09,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1592643674, now seen corresponding path program 1 times [2023-11-28 20:21:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:09,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961788687] [2023-11-28 20:21:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:09,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-28 20:21:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-28 20:21:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-28 20:21:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:10,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:10,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961788687] [2023-11-28 20:21:10,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961788687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:10,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 20:21:10,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793161152] [2023-11-28 20:21:10,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:21:10,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:21:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:21:10,005 INFO L87 Difference]: Start difference. First operand 553 states and 814 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:12,279 INFO L93 Difference]: Finished difference Result 1885 states and 2796 transitions. [2023-11-28 20:21:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:21:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2023-11-28 20:21:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:12,287 INFO L225 Difference]: With dead ends: 1885 [2023-11-28 20:21:12,287 INFO L226 Difference]: Without dead ends: 773 [2023-11-28 20:21:12,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:21:12,293 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1705 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:12,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 1451 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-28 20:21:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-11-28 20:21:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 697. [2023-11-28 20:21:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 545 states have (on average 1.455045871559633) internal successors, (793), 559 states have internal predecessors, (793), 89 states have call successors, (89), 50 states have call predecessors, (89), 61 states have return successors, (120), 90 states have call predecessors, (120), 85 states have call successors, (120) [2023-11-28 20:21:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1002 transitions. [2023-11-28 20:21:12,388 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1002 transitions. Word has length 58 [2023-11-28 20:21:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:12,389 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1002 transitions. [2023-11-28 20:21:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1002 transitions. [2023-11-28 20:21:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 20:21:12,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:12,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:21:12,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:12,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 400017257, now seen corresponding path program 1 times [2023-11-28 20:21:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:12,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602547783] [2023-11-28 20:21:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-28 20:21:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-28 20:21:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-28 20:21:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602547783] [2023-11-28 20:21:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602547783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 20:21:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210312918] [2023-11-28 20:21:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:21:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:21:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:21:12,562 INFO L87 Difference]: Start difference. First operand 697 states and 1002 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:13,604 INFO L93 Difference]: Finished difference Result 1527 states and 2208 transitions. [2023-11-28 20:21:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:21:13,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 59 [2023-11-28 20:21:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:13,607 INFO L225 Difference]: With dead ends: 1527 [2023-11-28 20:21:13,608 INFO L226 Difference]: Without dead ends: 170 [2023-11-28 20:21:13,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:21:13,614 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1053 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:13,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 822 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:21:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-28 20:21:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-28 20:21:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 143 states have (on average 1.5874125874125875) internal successors, (227), 145 states have internal predecessors, (227), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-28 20:21:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 265 transitions. [2023-11-28 20:21:13,635 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 265 transitions. Word has length 59 [2023-11-28 20:21:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:13,635 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 265 transitions. [2023-11-28 20:21:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-28 20:21:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 265 transitions. [2023-11-28 20:21:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:13,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:13,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:13,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:21:13,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:13,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 643537407, now seen corresponding path program 1 times [2023-11-28 20:21:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489386801] [2023-11-28 20:21:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489386801] [2023-11-28 20:21:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489386801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:21:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12420383] [2023-11-28 20:21:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:13,778 INFO L87 Difference]: Start difference. First operand 170 states and 265 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:14,508 INFO L93 Difference]: Finished difference Result 381 states and 604 transitions. [2023-11-28 20:21:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:21:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:14,511 INFO L225 Difference]: With dead ends: 381 [2023-11-28 20:21:14,511 INFO L226 Difference]: Without dead ends: 220 [2023-11-28 20:21:14,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:14,513 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 419 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:14,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 323 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:21:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-28 20:21:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 170. [2023-11-28 20:21:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 143 states have (on average 1.5804195804195804) internal successors, (226), 145 states have internal predecessors, (226), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-28 20:21:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 264 transitions. [2023-11-28 20:21:14,532 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 264 transitions. Word has length 82 [2023-11-28 20:21:14,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:14,532 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 264 transitions. [2023-11-28 20:21:14,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 264 transitions. [2023-11-28 20:21:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:14,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:14,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:14,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:21:14,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:14,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 566636609, now seen corresponding path program 1 times [2023-11-28 20:21:14,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:14,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269015610] [2023-11-28 20:21:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:14,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:14,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:14,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269015610] [2023-11-28 20:21:14,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269015610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:14,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:14,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:21:14,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491978561] [2023-11-28 20:21:14,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:21:14,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:21:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:14,702 INFO L87 Difference]: Start difference. First operand 170 states and 264 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:15,904 INFO L93 Difference]: Finished difference Result 591 states and 942 transitions. [2023-11-28 20:21:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:21:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:15,908 INFO L225 Difference]: With dead ends: 591 [2023-11-28 20:21:15,908 INFO L226 Difference]: Without dead ends: 432 [2023-11-28 20:21:15,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:21:15,910 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 621 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 540 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:21:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-28 20:21:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 331. [2023-11-28 20:21:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 284 states have (on average 1.591549295774648) internal successors, (452), 287 states have internal predecessors, (452), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2023-11-28 20:21:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 519 transitions. [2023-11-28 20:21:15,936 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 519 transitions. Word has length 82 [2023-11-28 20:21:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 519 transitions. [2023-11-28 20:21:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 519 transitions. [2023-11-28 20:21:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:15,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:15,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:21:15,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:15,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash -435462655, now seen corresponding path program 1 times [2023-11-28 20:21:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947879939] [2023-11-28 20:21:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:16,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:16,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947879939] [2023-11-28 20:21:16,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947879939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:16,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:16,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:16,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563110941] [2023-11-28 20:21:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:16,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:16,117 INFO L87 Difference]: Start difference. First operand 331 states and 519 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:17,575 INFO L93 Difference]: Finished difference Result 966 states and 1536 transitions. [2023-11-28 20:21:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:21:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:17,579 INFO L225 Difference]: With dead ends: 966 [2023-11-28 20:21:17,579 INFO L226 Difference]: Without dead ends: 646 [2023-11-28 20:21:17,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:17,581 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 622 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:17,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1021 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2023-11-28 20:21:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 481. [2023-11-28 20:21:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 414 states have (on average 1.5845410628019323) internal successors, (656), 418 states have internal predecessors, (656), 46 states have call successors, (46), 19 states have call predecessors, (46), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2023-11-28 20:21:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 751 transitions. [2023-11-28 20:21:17,611 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 751 transitions. Word has length 82 [2023-11-28 20:21:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:17,611 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 751 transitions. [2023-11-28 20:21:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 751 transitions. [2023-11-28 20:21:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:17,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:17,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:17,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:21:17,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:17,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash 518477503, now seen corresponding path program 1 times [2023-11-28 20:21:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942579457] [2023-11-28 20:21:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:17,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942579457] [2023-11-28 20:21:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942579457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:17,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617022266] [2023-11-28 20:21:17,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:17,762 INFO L87 Difference]: Start difference. First operand 481 states and 751 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:19,190 INFO L93 Difference]: Finished difference Result 1515 states and 2404 transitions. [2023-11-28 20:21:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:21:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:19,198 INFO L225 Difference]: With dead ends: 1515 [2023-11-28 20:21:19,198 INFO L226 Difference]: Without dead ends: 1045 [2023-11-28 20:21:19,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:19,201 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 620 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:19,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1019 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2023-11-28 20:21:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 782. [2023-11-28 20:21:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 675 states have (on average 1.5777777777777777) internal successors, (1065), 681 states have internal predecessors, (1065), 72 states have call successors, (72), 31 states have call predecessors, (72), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2023-11-28 20:21:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1220 transitions. [2023-11-28 20:21:19,284 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1220 transitions. Word has length 82 [2023-11-28 20:21:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:19,284 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1220 transitions. [2023-11-28 20:21:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1220 transitions. [2023-11-28 20:21:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:19,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:19,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:19,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:21:19,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:19,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash -697676223, now seen corresponding path program 1 times [2023-11-28 20:21:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:19,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700980162] [2023-11-28 20:21:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:19,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700980162] [2023-11-28 20:21:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700980162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:19,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:19,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629029864] [2023-11-28 20:21:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:19,457 INFO L87 Difference]: Start difference. First operand 782 states and 1220 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:21,011 INFO L93 Difference]: Finished difference Result 2572 states and 4073 transitions. [2023-11-28 20:21:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:21:21,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:21,020 INFO L225 Difference]: With dead ends: 2572 [2023-11-28 20:21:21,020 INFO L226 Difference]: Without dead ends: 1801 [2023-11-28 20:21:21,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:21,023 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 616 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:21,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1019 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:21:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2023-11-28 20:21:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1385. [2023-11-28 20:21:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1198 states have (on average 1.5717863105175292) internal successors, (1883), 1208 states have internal predecessors, (1883), 124 states have call successors, (124), 55 states have call predecessors, (124), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2023-11-28 20:21:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2164 transitions. [2023-11-28 20:21:21,109 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2164 transitions. Word has length 82 [2023-11-28 20:21:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:21,109 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 2164 transitions. [2023-11-28 20:21:21,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2164 transitions. [2023-11-28 20:21:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:21,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:21,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:21,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:21:21,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:21,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1429643649, now seen corresponding path program 1 times [2023-11-28 20:21:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:21,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043139171] [2023-11-28 20:21:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:21,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:21,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043139171] [2023-11-28 20:21:21,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043139171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:21,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:21,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:21,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116843271] [2023-11-28 20:21:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:21,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:21,254 INFO L87 Difference]: Start difference. First operand 1385 states and 2164 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:22,527 INFO L93 Difference]: Finished difference Result 4685 states and 7427 transitions. [2023-11-28 20:21:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:21:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:22,550 INFO L225 Difference]: With dead ends: 4685 [2023-11-28 20:21:22,550 INFO L226 Difference]: Without dead ends: 3311 [2023-11-28 20:21:22,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:22,556 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 672 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:22,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 670 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:21:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2023-11-28 20:21:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2596. [2023-11-28 20:21:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2249 states have (on average 1.5673632725655846) internal successors, (3525), 2267 states have internal predecessors, (3525), 228 states have call successors, (228), 103 states have call predecessors, (228), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2023-11-28 20:21:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 4076 transitions. [2023-11-28 20:21:22,759 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 4076 transitions. Word has length 82 [2023-11-28 20:21:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:22,759 INFO L495 AbstractCegarLoop]: Abstraction has 2596 states and 4076 transitions. [2023-11-28 20:21:22,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 4076 transitions. [2023-11-28 20:21:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:22,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:22,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 20:21:22,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:22,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1179143809, now seen corresponding path program 1 times [2023-11-28 20:21:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:22,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74266847] [2023-11-28 20:21:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74266847] [2023-11-28 20:21:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74266847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426562544] [2023-11-28 20:21:22,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:22,887 INFO L87 Difference]: Start difference. First operand 2596 states and 4076 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:24,508 INFO L93 Difference]: Finished difference Result 9615 states and 15303 transitions. [2023-11-28 20:21:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:24,552 INFO L225 Difference]: With dead ends: 9615 [2023-11-28 20:21:24,553 INFO L226 Difference]: Without dead ends: 7030 [2023-11-28 20:21:24,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:21:24,561 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 732 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:24,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 1008 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:21:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2023-11-28 20:21:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 4856. [2023-11-28 20:21:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4205 states have (on average 1.559334126040428) internal successors, (6557), 4239 states have internal predecessors, (6557), 420 states have call successors, (420), 199 states have call predecessors, (420), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2023-11-28 20:21:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7670 transitions. [2023-11-28 20:21:25,044 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7670 transitions. Word has length 82 [2023-11-28 20:21:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:25,044 INFO L495 AbstractCegarLoop]: Abstraction has 4856 states and 7670 transitions. [2023-11-28 20:21:25,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7670 transitions. [2023-11-28 20:21:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:25,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:25,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 20:21:25,051 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:25,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 761747203, now seen corresponding path program 1 times [2023-11-28 20:21:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856989222] [2023-11-28 20:21:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:25,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856989222] [2023-11-28 20:21:25,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856989222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:25,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:25,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984349996] [2023-11-28 20:21:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:25,200 INFO L87 Difference]: Start difference. First operand 4856 states and 7670 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:27,090 INFO L93 Difference]: Finished difference Result 17861 states and 28555 transitions. [2023-11-28 20:21:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:27,167 INFO L225 Difference]: With dead ends: 17861 [2023-11-28 20:21:27,168 INFO L226 Difference]: Without dead ends: 13016 [2023-11-28 20:21:27,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:21:27,188 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 633 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:27,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1012 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2023-11-28 20:21:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 9533. [2023-11-28 20:21:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9533 states, 8290 states have (on average 1.560313630880579) internal successors, (12935), 8356 states have internal predecessors, (12935), 788 states have call successors, (788), 391 states have call predecessors, (788), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2023-11-28 20:21:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9533 states to 9533 states and 15302 transitions. [2023-11-28 20:21:27,921 INFO L78 Accepts]: Start accepts. Automaton has 9533 states and 15302 transitions. Word has length 82 [2023-11-28 20:21:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:27,921 INFO L495 AbstractCegarLoop]: Abstraction has 9533 states and 15302 transitions. [2023-11-28 20:21:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9533 states and 15302 transitions. [2023-11-28 20:21:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:27,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:27,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:27,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 20:21:27,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:27,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1441019457, now seen corresponding path program 1 times [2023-11-28 20:21:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:27,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488771132] [2023-11-28 20:21:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488771132] [2023-11-28 20:21:28,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488771132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:28,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:28,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056135444] [2023-11-28 20:21:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:28,077 INFO L87 Difference]: Start difference. First operand 9533 states and 15302 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:30,372 INFO L93 Difference]: Finished difference Result 34320 states and 55705 transitions. [2023-11-28 20:21:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:30,455 INFO L225 Difference]: With dead ends: 34320 [2023-11-28 20:21:30,455 INFO L226 Difference]: Without dead ends: 24798 [2023-11-28 20:21:30,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:21:30,484 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 661 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:30,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1012 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:21:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24798 states. [2023-11-28 20:21:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24798 to 18886. [2023-11-28 20:21:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18886 states, 16491 states have (on average 1.5616396822509246) internal successors, (25753), 16621 states have internal predecessors, (25753), 1492 states have call successors, (1492), 775 states have call predecessors, (1492), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2023-11-28 20:21:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18886 states to 18886 states and 31050 transitions. [2023-11-28 20:21:31,939 INFO L78 Accepts]: Start accepts. Automaton has 18886 states and 31050 transitions. Word has length 82 [2023-11-28 20:21:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:31,940 INFO L495 AbstractCegarLoop]: Abstraction has 18886 states and 31050 transitions. [2023-11-28 20:21:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 18886 states and 31050 transitions. [2023-11-28 20:21:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:31,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:31,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 20:21:31,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -892373181, now seen corresponding path program 1 times [2023-11-28 20:21:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84603047] [2023-11-28 20:21:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84603047] [2023-11-28 20:21:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84603047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:32,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:32,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:32,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280545977] [2023-11-28 20:21:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:32,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:32,103 INFO L87 Difference]: Start difference. First operand 18886 states and 31050 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:35,148 INFO L93 Difference]: Finished difference Result 66279 states and 110287 transitions. [2023-11-28 20:21:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:35,317 INFO L225 Difference]: With dead ends: 66279 [2023-11-28 20:21:35,317 INFO L226 Difference]: Without dead ends: 47404 [2023-11-28 20:21:35,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:21:35,368 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 622 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:35,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1012 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:21:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47404 states. [2023-11-28 20:21:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47404 to 37591. [2023-11-28 20:21:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37591 states, 32956 states have (on average 1.5631447991261076) internal successors, (51515), 33214 states have internal predecessors, (51515), 2836 states have call successors, (2836), 1543 states have call predecessors, (2836), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2023-11-28 20:21:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37591 states to 37591 states and 64002 transitions. [2023-11-28 20:21:37,898 INFO L78 Accepts]: Start accepts. Automaton has 37591 states and 64002 transitions. Word has length 82 [2023-11-28 20:21:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:37,898 INFO L495 AbstractCegarLoop]: Abstraction has 37591 states and 64002 transitions. [2023-11-28 20:21:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37591 states and 64002 transitions. [2023-11-28 20:21:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-28 20:21:37,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:37,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 20:21:37,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:37,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -690549247, now seen corresponding path program 1 times [2023-11-28 20:21:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350802254] [2023-11-28 20:21:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:37,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350802254] [2023-11-28 20:21:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350802254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:21:38,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810398886] [2023-11-28 20:21:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:38,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:38,090 INFO L87 Difference]: Start difference. First operand 37591 states and 64002 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:46,127 INFO L93 Difference]: Finished difference Result 171255 states and 291288 transitions. [2023-11-28 20:21:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:21:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 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 82 [2023-11-28 20:21:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:46,600 INFO L225 Difference]: With dead ends: 171255 [2023-11-28 20:21:46,600 INFO L226 Difference]: Without dead ends: 133676 [2023-11-28 20:21:46,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:21:46,712 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1631 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:46,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 814 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 20:21:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133676 states. [2023-11-28 20:21:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133676 to 108866. [2023-11-28 20:21:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108866 states, 95021 states have (on average 1.544374401448101) internal successors, (146748), 96178 states have internal predecessors, (146748), 8444 states have call successors, (8444), 4633 states have call predecessors, (8444), 5400 states have return successors, (28268), 8310 states have call predecessors, (28268), 8442 states have call successors, (28268) [2023-11-28 20:21:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108866 states to 108866 states and 183460 transitions. [2023-11-28 20:21:54,967 INFO L78 Accepts]: Start accepts. Automaton has 108866 states and 183460 transitions. Word has length 82 [2023-11-28 20:21:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:54,968 INFO L495 AbstractCegarLoop]: Abstraction has 108866 states and 183460 transitions. [2023-11-28 20:21:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-28 20:21:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 108866 states and 183460 transitions. [2023-11-28 20:21:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-28 20:21:55,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:55,148 INFO L195 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:55,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 20:21:55,148 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:55,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1188991688, now seen corresponding path program 1 times [2023-11-28 20:21:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:55,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80666330] [2023-11-28 20:21:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:21:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:21:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:21:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:21:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:21:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-28 20:21:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-28 20:21:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-28 20:21:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 20:21:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80666330] [2023-11-28 20:21:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80666330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607067203] [2023-11-28 20:21:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:55,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:55,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:55,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:55,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:55,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:21:55,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:21:55,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607067203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:21:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-11-28 20:21:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786035166] [2023-11-28 20:21:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:55,835 INFO L87 Difference]: Start difference. First operand 108866 states and 183460 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-28 20:22:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:07,199 INFO L93 Difference]: Finished difference Result 324253 states and 551705 transitions. [2023-11-28 20:22:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 132 [2023-11-28 20:22:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:08,285 INFO L225 Difference]: With dead ends: 324253 [2023-11-28 20:22:08,285 INFO L226 Difference]: Without dead ends: 215399 [2023-11-28 20:22:08,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:22:08,600 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 213 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:08,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 460 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:22:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215399 states. [2023-11-28 20:22:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215399 to 214623. [2023-11-28 20:22:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214623 states, 187328 states have (on average 1.5398765801161598) internal successors, (288462), 189640 states have internal predecessors, (288462), 16494 states have call successors, (16494), 9265 states have call predecessors, (16494), 10800 states have return successors, (55694), 15973 states have call predecessors, (55694), 16492 states have call successors, (55694) [2023-11-28 20:22:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214623 states to 214623 states and 360650 transitions. [2023-11-28 20:22:23,201 INFO L78 Accepts]: Start accepts. Automaton has 214623 states and 360650 transitions. Word has length 132 [2023-11-28 20:22:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:23,201 INFO L495 AbstractCegarLoop]: Abstraction has 214623 states and 360650 transitions. [2023-11-28 20:22:23,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-28 20:22:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 214623 states and 360650 transitions. [2023-11-28 20:22:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-28 20:22:23,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:23,470 INFO L195 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:23,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:22:23,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:23,671 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:23,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -174989288, now seen corresponding path program 1 times [2023-11-28 20:22:23,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:23,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984338332] [2023-11-28 20:22:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:23,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:22:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:22:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:22:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:22:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:22:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-28 20:22:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-28 20:22:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-28 20:22:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 20:22:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984338332] [2023-11-28 20:22:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984338332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112106636] [2023-11-28 20:22:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:23,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:22:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:24,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:22:24,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-28 20:22:24,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:22:24,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112106636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:22:24,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:22:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-11-28 20:22:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563783279] [2023-11-28 20:22:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:22:24,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:22:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:22:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:22:24,254 INFO L87 Difference]: Start difference. First operand 214623 states and 360650 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-11-28 20:22:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:47,654 INFO L93 Difference]: Finished difference Result 637236 states and 1079895 transitions. [2023-11-28 20:22:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:22:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 132 [2023-11-28 20:22:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:49,584 INFO L225 Difference]: With dead ends: 637236 [2023-11-28 20:22:49,586 INFO L226 Difference]: Without dead ends: 422625 [2023-11-28 20:22:50,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:22:50,137 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 208 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:50,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 461 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:22:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422625 states. [2023-11-28 20:23:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422625 to 421077. [2023-11-28 20:23:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421077 states, 368326 states have (on average 1.5365681488681222) internal successors, (565958), 372948 states have internal predecessors, (565958), 31294 states have call successors, (31294), 18385 states have call predecessors, (31294), 21456 states have return successors, (108667), 29999 states have call predecessors, (108667), 31292 states have call successors, (108667) [2023-11-28 20:23:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421077 states to 421077 states and 705919 transitions. [2023-11-28 20:23:16,706 INFO L78 Accepts]: Start accepts. Automaton has 421077 states and 705919 transitions. Word has length 132 [2023-11-28 20:23:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:16,706 INFO L495 AbstractCegarLoop]: Abstraction has 421077 states and 705919 transitions. [2023-11-28 20:23:16,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-11-28 20:23:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 421077 states and 705919 transitions. [2023-11-28 20:23:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-28 20:23:17,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:17,183 INFO L195 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:17,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:23:17,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:17,384 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:17,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1449320136, now seen corresponding path program 1 times [2023-11-28 20:23:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721201925] [2023-11-28 20:23:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 20:23:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-28 20:23:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-28 20:23:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-28 20:23:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-28 20:23:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-28 20:23:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-28 20:23:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-28 20:23:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 20:23:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721201925] [2023-11-28 20:23:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721201925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024869532] [2023-11-28 20:23:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:17,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:17,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:17,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7171fe85-11da-46ce-9363-bf82c0c03703/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:23:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:17,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:23:17,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-28 20:23:17,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:23:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024869532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:23:17,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:23:17,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-28 20:23:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497928368] [2023-11-28 20:23:17,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:23:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:23:17,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:23:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:23:17,692 INFO L87 Difference]: Start difference. First operand 421077 states and 705919 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-11-28 20:24:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,203 INFO L93 Difference]: Finished difference Result 1244397 states and 2111096 transitions. [2023-11-28 20:24:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 132 [2023-11-28 20:24:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:08,017 INFO L225 Difference]: With dead ends: 1244397 [2023-11-28 20:24:08,017 INFO L226 Difference]: Without dead ends: 823333